Right now its 3 am on a Saturday and I'm staying up to watch Professor Leonard's calc vids. I told myself just one more and here I am. As someone who spends their time on Netflix and suffers from chronic laziness, Professor Leonard managed to engage me so much so that I'm binge watching his videos and taking notes like its a new and hot Netflix series that came out. You sir are legendary.
I can totally relate - I've wasted so many years by wasting time - or killing time by watching netflix. Professor Leonard changed my life. thats why I'm now a monthly patreon
@@freezinginhere He got me an A in Calc 1! I definitely don't love math the way he does, but his lectures made it make so much more sense. I didn't even bother watching my own instructor's videos once I found this channel.
@@absentvictim My instructor doesn't even have videos, he just posts links to Professor Leonard and The Organic Chemistry Tutor and then gives us a bunch of homework. I'm so glad I'm paying for his services -.- I wish the money went to these youtubers, since they're the ones doing all the work for my education.
@@voxvolhynia5400 my instruction is the same, these people should be fired they dont even try, instead uses someone's work as their own. and i looked up how much my professor makes, he makes roughly $120k a year and does nothing. imagine that.
After all these years, I have found the perfect video series. It's 6:43 am, I stayed up all night studying for an exam today (probably a bad idea), and just found these videos, and now I can only be jealous that I dont have a professor this good at teaching. Hopefully watching these lessons will save me today
This is fascinating after taking your Precalculus/Trigonometry course. Knowing how you can use sin and cos to model oscillations and now being able to obtain the rate of change at a given time is really enlightening. I tried going through this course several years ago, and this lecture was so perplexing at the time, not knowing the prerequisites, that I gave up. Now 4 years later it seems really easy. Filling in that missing puzzle piece in your course list was clutch sir, and needed for so many of us.
I am preparing for my Calc class for spring 2019 with my former trig teacher in spring of 2016. I earned an A in trigonometry in her class. I got a B in Precalculus with a teacher that talked really fast. I had to take a 2 year break from school in 2017 due to life struggles but during those two years I have been watching math videos and looking over my notes. I am going to do whatever it takes to understand Calculus so I can go on towards Calc 2 and Calc 3 and Professor Leonard's videos has helped so much in understanding Math, thank you. I also noticed a pattern in the derivatives of trig functions. Every trig function that starts with a "C" (Cos, CSC, COT), the derivative is going to be a negative. Pair TAN with SEC and COT with CSC.
@@quanesshatheseventeenth8617 yes. I received a high A in Calculus 1, Calculus 2 and Calculus 3. I have to say thank you to professor Leonard's videos as well as taking a good instructor that was a visual learner like me. Now I have been tutoring those classes for the past 3 years.
Even today, 2023. Professor Leonard videos are still relevant and essential. I can spend all day watching his videos. Makes maths look easier. I was not performing really well on my studies but since I started watching him. My maths results are getting better and better. Masterpiece in Maths. FROM SOUTH AFRICA
I used to cry out of frustration during my first semester calculus, thank god I found this channel. Not only helped me understand but also helped my mental health. Now calc is kinda fun haha
I wish my calculus teacher was like you , if there is someone who's making me feel like calculus is fun to learn then it is surely you , Prof Leonard , thank you so much for all your videos.
Sir, from your previous lectures finally I've learned how to easily prove if a mathematical expression is true or not. Thank you for your work. I'm proud to say I can finally prove derivatives of trigonometric functions by myself without asking someone.
Thanks for making these, like all the others have said and will continue to do. I'm a somewhat older student coming to university for the first time. At the recommendation of my college I went through a precalculus and calculus I sequence that for some reason included NO trigonometry. I didn't realize what I was getting into at the time or what I was missing out on, but I've since transferred to a new university and into a calculus II class (somehow my calc I class transferred despite the curriculum covering NO trig) and am scrambling to catch up in some ways. Of course I'm ahead in others as my old school Calculus I course covered almost all the topics concerning integration and The Fundamental Theorem normally covered in calculus II. I did take trigonometry in high school, but that was a while back. These lectures are rather helpful. All I really need is to get my hands on a good trig handbook now to cover those fundamental parts.
You will generally find trigonometry covered well in just a few chapters of a precalculus book. I recommend Algebra Structure and Method by Dolciani and Brown or Advanced Mathematics by Brown. These books are written in a lean style, but given that you have done some coursework beyond this level, you should be able to handle it and will benefit in your future math by getting comfortable with this style of writing. The exercises are well-chosen. If you can do the A and B level ones, you will be fine for calculus, but I recommend working on the hard C level exercises, too, because, as I said, they are well-chosen. Dolciani also wrote Modern Advanced Analysis, also written in a lean style, which has chapters on trigonometry (and even has some other chapters introducing calculus). All these books are long out of print, but are available used at reasonable prices. I carefully worked through the first two of these books, in the order listed, and they have been a huge help. Another choice is Larson's Precalculus. This is a book still in popular use, although I would save a couple bucks and not buy the very latest edition.
Thank you. I appreciate the recommendations for textbooks and I will check them out. I was surprised, when I tried to consult my professors on this topic I was met with just some shock, they didn't have much to say on the topic of recommended texts, so I figured I'd turn to sources like this or MIT Open Courseware to do some self-study. I'm actually in school for physics and mathematics, so I will be using trig quite often and I don't feel intimidated by sitting down to read a math text. Those sound just like I was looking for.
Based on your reply, I am even more comfortable recommending the Algebra Structure and Method Book II (I should have added the book II part above; there is a book I, which is first year algebra-too easy for you, and no trig) or Advanced Mathematics book to you for the trig (and precalculus in general). You seem to have more than enough mathematical maturity to handle their style, and will actually benefit from getting used to it. For other people reading this chain: In general, since you are on a calculus video website, you are most likely able to benefit from these old Brown and Dolciani books as a good precalculus reference and source for brushing up. These books can be a little tough for those intimidated by math and who don't have a good teacher. My personal story with them is that I had the Algebra I book way, way back in time (in the 8th grade). My teacher wasn't good, my parents didn't know enough math to help, and I was a pretty lazy student, so it didn't work out for me, and I actually blamed the books a lot (unfairly, instead of blaming myself-although I did blame my teacher, too, and he deserved it). As an adult, I came back to the series and really appreciated it. The writing style is an austere math writing style and there aren't tons of worked examples. But the exercise sets take you carefully from easy to pretty hard. There are solutions manuals available for sale, but in contrast to the low price of these old, used books, they are expensive.
For all students who visit this guy's RUclips channel"this guy deserves way more"(thanks prof for being a cool teacher I admire you...we all are lucky to find you ..)and I know I am not the only one whose complete perspective of calculus changes within one playslist You will forever be my favourite teacher❤️ Thank you my real life superman🙌 Ps(yeah I know he don't check comments)
Thanks so much! I have watched many videos, but I find yours are always the best!! I'm taking calculus right now in the spring semester and was getting lost with my professor.... you're saving my semester!! you explain the concept really well.
I needed a solid refresher on calculus 1, i may end up just watching his videos through the end of calculus 3 just so i can zone out in future classes.
"no sense of humor today at all... nothing, stand up next time maybe you'll get it" tell me why I busted out laughing. Professor Leonard, really appreciate your class they are making miracles happen one lecture at a time.
Derivatives are awesome, easier than electromagnetism in physics. I could never do Coulomb's Law or any of those formulas related to electromagnetism like I do derivatives. Non-Newtonian physics is even more complex than linear algebra.
Nilmini Deen, Applying the derivative formula for inverse sine and using the product rule for differentiating the inside function 1/x, whose derivative is -1/x^2 d/dx [arcsin(1/x)] = -1/sqrt(1-1/x^2)x^2
Professor Leonard ! You are an excellent Professor of mathematics! You have given me the slippery slope ! But thank God not the slippery slip ! Ha ha !! Thank you !!!
38:15 The student actually had a good question... the professor's explanation helped me finally understand why d/dx(sin(x)) is cos(x). I feel so enlightened....
Ok I seriously need to have him as my new teacher. He has helped me to decipher Calc and help me complete my goal of completing Calc 1 by 16 years old. This is much appreciated. You have my many thanks.
i swear if you were to come to south africa we would laugh at every single one of your jokes ,we just dizzy like that😂😂(you got the quietest class ever)
I am having a problem with sin(h)/h and cos(h)/h as h -> 0. It seems you are dividing by zero. Can you direct me to where that proof is explained better? I am missing something. Maybe there is a textbook that explains it better? I have already taken all the Calculus classes and am going over all my classes. Calculus is, by far, the most interesting subject I have ever taken and I'm wanting to understand stuff I glossed over before.
Sorry this is late, but if you've seen the earlier videos, the limit as h->0 doesn't mean h = 0, because then why use limits? We use limits to say what happens as h gets arbitrarily close to being 0, while still avoiding the domain issue. It's really a neat trick
As a note: There's a mistake at the beginning: It should read limit of x approaches 0, not h. For sin(x)/x and (1-cos(x))/x. Later the usage of h is correct. After the break both expressions are corrected.
I have an eternal problem with sin(h)/h =1 as h -> 0. I can use L'hopital's rule when limits become 0/0 then sin(0)/0 evaluates to cos(0)/1 which is 1.
I have one doubt at time 32:45 . Since 'x' is variable, and cos(x) could possibly be -1 somewhere, therefore 1+cos(x) could be 0 somewhere. Then, how did we cancel this expression [1+cos(x)] from numerator and denominator?
at that of x=(2n+1)pi point the function y wouldn’t exist .. so we wouldn’t be taking the derivative in the first place .. if we are taking the the derivative of a function it means that it should exist .. and so cosx is not -1.. and hence can be cancelled
Why do the derivatives of trig functions cycle through themselves every fourth iteration in the same way that the power of i cycles through itself every fourth iteration?
![Derivatives of Trig Functions (Sin, Cos, Tan) in Calculus - [1-4]](/img/1.gif)
Right now its 3 am on a Saturday and I'm staying up to watch Professor Leonard's calc vids. I told myself just one more and here I am. As someone who spends their time on Netflix and suffers from chronic laziness, Professor Leonard managed to engage me so much so that I'm binge watching his videos and taking notes like its a new and hot Netflix series that came out. You sir are legendary.
These videos should be on netflix
Just wish I could understand trig, But the man hynotizes me
I can totally relate - I've wasted so many years by wasting time - or killing time by watching netflix. Professor Leonard changed my life. thats why I'm now a monthly patreon
i can absolutely relate to this
@@dougjohnson5487 I now am late but the prof now has a precalc section in which he covers trignometry extensively.
You are a very mindful professor. My professor will make anybody feel like they're stupid for asking any question about algebra.
I can’t believe I just found this guy 6 weeks into the semester 😵
Thank you in advance for getting me through calculus!
How'd it go?! Are you in calc III now?
@@freezinginhere He got me an A in Calc 1! I definitely don't love math the way he does, but his lectures made it make so much more sense. I didn't even bother watching my own instructor's videos once I found this channel.
@@absentvictim My instructor doesn't even have videos, he just posts links to Professor Leonard and The Organic Chemistry Tutor and then gives us a bunch of homework. I'm so glad I'm paying for his services -.- I wish the money went to these youtubers, since they're the ones doing all the work for my education.
@@voxvolhynia5400 I agree completely!!
@@voxvolhynia5400 my instruction is the same, these people should be fired they dont even try, instead uses someone's work as their own. and i looked up how much my professor makes, he makes roughly $120k a year and does nothing. imagine that.
After all these years, I have found the perfect video series. It's 6:43 am, I stayed up all night studying for an exam today (probably a bad idea), and just found these videos, and now I can only be jealous that I dont have a professor this good at teaching.
Hopefully watching these lessons will save me today
did it save you ?
@@jash8281 I dont remember about that specific exam, but I passed the class with a C so I'd say yeah it did enough
@@davidsphere43proud
If it’s not a secret: what university?…
@@mary56789 Northern Arizona University
I wish my tuition money was going to you instead of my half-assing prof at UTA
arlington in da house!
Felt this in my soul 💔
9 years later and UTA still got those type of professors
@@stevensteezy8420 lmao that is hilarious. My god this vid gives me PTSD just thinking about those times. Good luck man.
This is fascinating after taking your Precalculus/Trigonometry course. Knowing how you can use sin and cos to model oscillations and now being able to obtain the rate of change at a given time is really enlightening. I tried going through this course several years ago, and this lecture was so perplexing at the time, not knowing the prerequisites, that I gave up. Now 4 years later it seems really easy. Filling in that missing puzzle piece in your course list was clutch sir, and needed for so many of us.
I am preparing for my Calc class for spring 2019 with my former trig teacher in spring of 2016. I earned an A in trigonometry in her class. I got a B in Precalculus with a teacher that talked really fast. I had to take a 2 year break from school in 2017 due to life struggles but during those two years I have been watching math videos and looking over my notes. I am going to do whatever it takes to understand Calculus so I can go on towards Calc 2 and Calc 3 and Professor Leonard's videos has helped so much in understanding Math, thank you. I also noticed a pattern in the derivatives of trig functions. Every trig function that starts with a "C" (Cos, CSC, COT), the derivative is going to be a negative. Pair TAN with SEC and COT with CSC.
Aye did you succeed bro?
@@quanesshatheseventeenth8617 yes. I received a high A in Calculus 1, Calculus 2 and Calculus 3. I have to say thank you to professor Leonard's videos as well as taking a good instructor that was a visual learner like me. Now I have been tutoring those classes for the past 3 years.
@@UndoneJigsaw say less. Im boutta binge these
wow man thats awsome@@UndoneJigsaw
I took a weekend break when you said: "We will get to the rest of it next time" at 3:53... Excellent work Prof.
Even today, 2023. Professor Leonard videos are still relevant and essential. I can spend all day watching his videos. Makes maths look easier. I was not performing really well on my studies but since I started watching him. My maths results are getting better and better. Masterpiece in Maths. FROM SOUTH AFRICA
I used to cry out of frustration during my first semester calculus, thank god I found this channel. Not only helped me understand but also helped my mental health. Now calc is kinda fun haha
I wish my calculus instructor taught as well as you do. This is saving my future career. THANK YOU!
2021...and this channel is still my favourite.
I wish my calculus teacher was like you , if there is someone who's making me feel like calculus is fun to learn then it is surely you , Prof Leonard , thank you so much for all your videos.
God bless you sir, i have learnt all of my calculus from your videos so far.
used to hate trig in high school but first year of university this man made me love it and i feel like a genius
This guy makes me love math again!!!!!! THANK YOU
"Make math great again!"
Sir, from your previous lectures finally I've learned how to easily prove if a mathematical expression is true or not. Thank you for your work. I'm proud to say I can finally prove derivatives of trigonometric functions by myself without asking someone.
Thanks for making these, like all the others have said and will continue to do. I'm a somewhat older student coming to university for the first time. At the recommendation of my college I went through a precalculus and calculus I sequence that for some reason included NO trigonometry. I didn't realize what I was getting into at the time or what I was missing out on, but I've since transferred to a new university and into a calculus II class (somehow my calc I class transferred despite the curriculum covering NO trig) and am scrambling to catch up in some ways. Of course I'm ahead in others as my old school Calculus I course covered almost all the topics concerning integration and The Fundamental Theorem normally covered in calculus II. I did take trigonometry in high school, but that was a while back. These lectures are rather helpful. All I really need is to get my hands on a good trig handbook now to cover those fundamental parts.
You will generally find trigonometry covered well in just a few chapters of a precalculus book.
I recommend Algebra Structure and Method by Dolciani and Brown or Advanced Mathematics by Brown. These books are written in a lean style, but given that you have done some coursework beyond this level, you should be able to handle it and will benefit in your future math by getting comfortable with this style of writing. The exercises are well-chosen. If you can do the A and B level ones, you will be fine for calculus, but I recommend working on the hard C level exercises, too, because, as I said, they are well-chosen. Dolciani also wrote Modern Advanced Analysis, also written in a lean style, which has chapters on trigonometry (and even has some other chapters introducing calculus). All these books are long out of print, but are available used at reasonable prices. I carefully worked through the first two of these books, in the order listed, and they have been a huge help.
Another choice is Larson's Precalculus. This is a book still in popular use, although I would save a couple bucks and not buy the very latest edition.
Thank you. I appreciate the recommendations for textbooks and I will check them out. I was surprised, when I tried to consult my professors on this topic I was met with just some shock, they didn't have much to say on the topic of recommended texts, so I figured I'd turn to sources like this or MIT Open Courseware to do some self-study. I'm actually in school for physics and mathematics, so I will be using trig quite often and I don't feel intimidated by sitting down to read a math text. Those sound just like I was looking for.
Based on your reply, I am even more comfortable recommending the Algebra Structure and Method Book II (I should have added the book II part above; there is a book I, which is first year algebra-too easy for you, and no trig) or Advanced Mathematics book to you for the trig (and precalculus in general). You seem to have more than enough mathematical maturity to handle their style, and will actually benefit from getting used to it.
For other people reading this chain:
In general, since you are on a calculus video website, you are most likely able to benefit from these old Brown and Dolciani books as a good precalculus reference and source for brushing up.
These books can be a little tough for those intimidated by math and who don't have a good teacher. My personal story with them is that I had the Algebra I book way, way back in time (in the 8th grade). My teacher wasn't good, my parents didn't know enough math to help, and I was a pretty lazy student, so it didn't work out for me, and I actually blamed the books a lot (unfairly, instead of blaming myself-although I did blame my teacher, too, and he deserved it). As an adult, I came back to the series and really appreciated it.
The writing style is an austere math writing style and there aren't tons of worked examples. But the exercise sets take you carefully from easy to pretty hard. There are solutions manuals available for sale, but in contrast to the low price of these old, used books, they are expensive.
You're the best. As soon as I can I will donate a good quantity to your Patreon account.
Thanks so much, I really appreciate it!!
How a great explanation! Good job professor 🤓 .. your new student from Saudi Arabia 🇸🇦
🇸🇦🇸🇦🇸🇦
For all students who visit this guy's RUclips channel"this guy deserves way more"(thanks prof for being a cool teacher I admire you...we all are lucky to find you ..)and I know I am not the only one whose complete perspective of calculus changes within one playslist
You will forever be my favourite teacher❤️
Thank you my real life superman🙌
Ps(yeah I know he don't check comments)
"Good deal, alright!"
Haha cheers mate, your classes are brilliant, you are the reason I'll be passing calculus this year!
you cant imagine how much your videos help use,despite 6 years have passed by. Thank you Sir. Ihope all good for you in your life
Can you also do workout routine??? Lol hahaha
hahahhahahahahhahahha
Thanks so much! I have watched many videos, but I find yours are always the best!! I'm taking calculus right now in the spring semester and was getting lost with my professor.... you're saving my semester!! you explain the concept really well.
I needed a solid refresher on calculus 1, i may end up just watching his videos through the end of calculus 3 just so i can zone out in future classes.
A great teacher👨🏫
Respect from INDIA
38:00 I am glad the student asked that question. I was thinking of that same exact thing myself throughout the video as well.
Super grateful for this. I couldn’t for the life of me make trig work but didn’t have any issues with normal differentiation.
just discovered your channel a few days ago and I'm hooked up like crazy. You are the best teacher i've ever had. Thank you!!
that explanation at 37:25 clarified a lot... thank you... I love when questions I needed to ask that I couldn't think of are asked and answered
"no sense of humor today at all... nothing, stand up next time maybe you'll get it" tell me why I busted out laughing.
Professor Leonard, really appreciate your class they are making miracles happen one lecture at a time.
We need more professor like you! Too many lazy unorganized pissy teachers teaching math.
i just decided to go back to school, taking all my classes online, and your video are
everything for my. THANK YOU VERY MUCH SIR
Derivatives are awesome, easier than electromagnetism in physics. I could never do Coulomb's Law or any of those formulas related to electromagnetism like I do derivatives.
Non-Newtonian physics is even more complex than linear algebra.
Highlight of my life
no words to appreciate your great work sir, thank you❤
Nilmini Deen,
Applying the derivative formula for inverse sine and using the product rule for differentiating the inside function 1/x, whose derivative is -1/x^2
d/dx [arcsin(1/x)] = -1/sqrt(1-1/x^2)x^2
you have blessed many
very very helpful I never did calculus and now i understand everything. Its like i am actually in the classrom
Professor Leonard is like a hot buff Will Hunting
"He's wicked smart"
Prof, you are the best, excellent explanations in all of your concepts
Professor Leonard ! You are an excellent Professor of mathematics! You have given me the slippery slope ! But thank God not the slippery slip ! Ha ha !! Thank you !!!
now i remember why i used to love math...finally got a chance to come back after 50 years.
Thank you Professor Leonard
18:37 LMAO. Prof Leonard makes learning calculus actually entertaining.
38:15 The student actually had a good question... the professor's explanation helped me finally understand why d/dx(sin(x)) is cos(x). I feel so enlightened....
Thank you, fun lecture. Enjoy being part of your (youtube) class
Professor Leonard, you are amazing. I'm going to move to Idaho just so that I can audit your classes.
2021.. before the finals week you're saving my life
you are the best math teacher
Literally saving lives
2023
your amaizng professor ever
Ok I seriously need to have him as my new teacher. He has helped me to decipher Calc and help me complete my goal of completing Calc 1 by 16 years old. This is much appreciated. You have my many thanks.
bc of prof. leonard i only stay up till 2am instead of 5am
damn professor leonard's shredded
Thank you for making these videos.
I made this far.. and it feels good
This was very helpful, Thanks
the thattutorguy ad is so accurate
i swear if you were to come to south africa we would laugh at every single one of your jokes ,we just dizzy like that😂😂(you got the quietest class ever)
Youre better than any calculus professor at UCLA lol tysm
God bless you sir
Not fing joking. 18:02. I am watching this stuff because during covid I passed and now I am having trouble in Physics.
Just remember, If you want him as your professor you got to go to Merced. Merced is a city in California.
Thanks our HERO!
may god bless your soul
Bthis was fun to watch
11:02
"Isn't that interesting?!"
"...no"
"No? No. Don't care.............. You're gonna care"
This guy is a savage to his students sometimes hahaha
Thank you for this!
I am having a problem with sin(h)/h and cos(h)/h as h -> 0. It seems you are dividing by zero. Can you direct me to where that proof is explained better? I am missing something. Maybe there is a textbook that explains it better? I have already taken all the Calculus classes and am going over all my classes. Calculus is, by far, the most interesting subject I have ever taken and I'm wanting to understand stuff I glossed over before.
ruclips.net/video/VSqOZNULRjQ/видео.html
Check it
Sorry this is late, but if you've seen the earlier videos, the limit as h->0 doesn't mean h = 0, because then why use limits? We use limits to say what happens as h gets arbitrarily close to being 0, while still avoiding the domain issue. It's really a neat trick
Wow 37:30 made me finally understand.
Thank you great professor
By the way, apart from lectures of the professor, I also like the laughter of one of the students :)
ive watched so many of these that I know who you're talking about - Scotty i think! the professor talks to him during these videos sometimes LOL
@@marie8363 Lmao I'm here for Scott
thank you so much for these videos
at 33:00 I think it can go further to 1+ SEC(X)
This makes me miss my math classes :(
As a note: There's a mistake at the beginning: It should read limit of x approaches 0, not h. For sin(x)/x and (1-cos(x))/x. Later the usage of h is correct. After the break both expressions are corrected.
No. It's as h->0 because it comes from the difference quotient (much earlier chapter).
Thank you professor
Outstanding, thank you.
I started getting lost in this one
I have an eternal problem with sin(h)/h =1 as h -> 0. I can use L'hopital's rule when limits become 0/0 then sin(0)/0 evaluates to cos(0)/1 which is 1.
I feel like I am going through hyperspace going through a few of these videos.
i remember it like sin is - mean sin and csc. and tan is sec and cot is -csc
I have one doubt at time 32:45 . Since 'x' is variable, and cos(x) could possibly be -1 somewhere, therefore 1+cos(x) could be 0 somewhere. Then, how did we cancel this expression [1+cos(x)] from numerator and denominator?
at that of x=(2n+1)pi point the function y wouldn’t exist .. so we wouldn’t be taking the derivative in the first place .. if we are taking the the derivative of a function it means that it should exist .. and so cosx is not -1.. and hence can be cancelled
In the word problem would you get just -sin(X) instead of 3sin(X)? given that the derivative of -3 is 0
Damn, Prof Leonard is buff!
Why do the derivatives of trig functions cycle through themselves every fourth iteration in the same way that the power of i cycles through itself every fourth iteration?
Thank you Prof !!!! 💪
Thanks again!
good job prof
Wish you were my teacher
I wish I could of had you as a professor. Thank you sooo much for uploading these videos!
Could you please turn on captions for this video?
enjoyable thank you
Thank you!
you are the beast
hahah a stundent asked abt the oscillating function of sinus , i was asking myself the same thing
same!
You and NancyPi are my favorites and I probably won't survive calculus without you both, btw, you guys would make a cute couple
You are saving my life.. >.
Anyone else catch the reference to "Friday" at 18:17? I love it! hahahaha
you aint got $%#& to do!! except calculus..if you want a wife lol