Trigonometry - Free Formula Sheet: bit.ly/47diggI Final Exams and Video Playlists: www.video-tutor.net/ Next Video: ruclips.net/video/bm8oYKKlCXI/видео.html
My final exams are coming up in about two weeks and you are really saving my ass here. I hope I get no less than a 90% on my final. Your methods are so much more straight to the point and simple than the stupid textbook assigned to me. Thank you so much bro!
MR. Organic Chemistry Tutor, once again, this is another solid analysis of Reference Angle to Evaluate Trigonometry Functions. These videos/lectures continue to be outstanding.
Thank you sooo much, I had struggled doing my homework but my it will be much easier... To be honest I watch tons of video about this but ur method is best of all👊🏻
I should have given this guy my tuition instead because he is the only reason Im able to pass any of my math classes. My professor is literally just there to confuse the hell out of me.
If I can invent "immortal pills", you're the first person I will give one for free so you can live forever and teach us more because you're a better teacher and I've learned so much from you!! thanks for your hardworkkk!!❤
This is actually really simple but I have to do these problems super fast so I won’t be able to take time to draw a graph. I’m just gonna have to memorize..
What if the denominator is not 3,6, or 4 for the radians. For example, my professor gave me this problem: cos (-9 Pi/ 2). The way he explained it had me really lost but I know the answer is 0... but why?
Why is it 60 degrees at 10:11 isn't it supposed to be 30 degrees since 270 - 240 is 30? and shouldn't it be in the other half of quadrant 2? Someone help I'm confused. Edit: Lmao I'm still waiting for an answer. Please help me lol even if this is comment is posted a long time ago. 😞✊ 😂
It was rationalized. In order to remove the radical sign in the denominator, it was multiplied with a fraction which both numerator and denominator has the same value of the denominator of the previous fraction. So, numerator would be square root of three, while denominator would be 3 (square root of 3^2 is 3). Note that it is only rewritten, so the value doesnt change because it was basically multiplied to 1.
I have a honours pre calc final tmr I need a 38 on this final exams to pass the class 😂 I have no idea what was going on this whole year despite trying so hard to understand.🤞🤞🤞
because third quadrant have both negative, think it easy as first have all positive, second have a negative go first and a positive go second, next we have quadrant III with all negative and quadrant IV with a positive goes first and then a negative.
Trigonometry - Free Formula Sheet: bit.ly/47diggI
Final Exams and Video Playlists: www.video-tutor.net/
Next Video: ruclips.net/video/bm8oYKKlCXI/видео.html
He has helped me in every subject from physics to math to even computers, but i have never seen him teaching organic chemistry!
thank you SO MUCH mate i was literally at the point of tears because I didn't get it
esther shih me lol
Same , and my teacher just skips a bunch of steps. I just can't follow her lol
Well you should’ve just cried
Why do you care so much
me too
My final exams are coming up in about two weeks and you are really saving my ass here. I hope I get no less than a 90% on my final. Your methods are so much more straight to the point and simple than the stupid textbook assigned to me. Thank you so much bro!
Howd your exam go
Did your exams go well?
@@svijayiitk I think they didn't go so well after all😂😂
@@enockmboya2323 lol🤣
@@wanda9394 😂no reply then you can get the answer from that
MR. Organic Chemistry Tutor, once again, this is another solid analysis of Reference Angle to Evaluate Trigonometry Functions. These videos/lectures continue to be outstanding.
man ur the only person getting me thru math this semester
Nobody can save me now lul
@@eosdawn6399 u good?
I'm really having a hard time coping up at online class and you're saving my grades, thanks man
I have my regional maths competition next week and you just saved me from getting absolutely destroyed by trigonometry..THX
I have my trig final tomorrow and im only just now understanding this. thank you for your help!!
This man has probably taught more helpful information than all of my teachers combined ever.
You saved me, I hope you’re doing great man you’re a real one
Thank you sooo much, I had struggled doing my homework but my it will be much easier... To be honest I watch tons of video about this but ur method is best of all👊🏻
Brilliantly presented. You are clear and easy to follow. Your work is very relevant. Thank you.
The assignment given to me was completely different than the notes my teacher gave me :))) ty for making this video otherwise I would be lost.
Your explanation was so systematic, clear and easy to understand. Thanks👍
This dude has carried me through highschool and now in college. You are a great man
I just picked up more math tips in 10 minutes than I have the whole year of my math class
he explained it so well in 2 mins, i was able to save myself from an hour of confusion and mental breakdown :0
Your amazing, I can't believe how much you've helped me understand math concepts
3:40 how do you determine the quadrants if the values are different?
no clue
wow that's a game change. Thank you very much men, it's really helped me to understand better how to find the reference angle
what about an angle like 205.5? how do you apply the 30,60,90 triangle there?
Pray
In 8:21, I don't get why you add 8 pie over 4. I'm literally confused
that moment when a youtube video teaches you more than your math teacher
10:12 isnt sin is supposed to be positive in the first quadrant? 240 degree is in the third quadrant right? That is 270-240=30, the answer -2.
1:34 Why is the hypotenuse always positive?
I should have given this guy my tuition instead because he is the only reason Im able to pass any of my math classes. My professor is literally just there to confuse the hell out of me.
you are the best maths RUclipsr i recommend changing your name to the organic maths tutor
LoL. This was included in our exam, but my teacher didn't provide ample examples and a clear explanation in our lesson. Thanks for this!!
I swear you always come in clutch when I need you the most lol
Taught me more in a few minutes than a teacher with a college degree could in an hour
Hi, how can we know if triangles 45° and 45° or 30° and 60°?
Late but look up Unit Circle and that should help.
thank you so much youre seriously saving my online education
Thank you so much for your help i only understood after watching your videos
1:23 when should it be negative？
Think of it as a graph. Left side is negative, bottom as well.
Finally I understand how to find sine cosine of an angle
May I ask sir how the sides of the 45 degree angle is 1,1,and square root of 2?
This is truly on of the useful ever found! Helped me alot🙏🏻
1:32 it should be positive sqrt of 3, right? the one that is negative is its denominator 2
no
It's like a graph. The bottom is negative
What if the angles are not special triangles? What is the number across it?
u arent tested on that ever.
omg this. Thank you so much. Pearson sucks, but you explained this so well. Thank you!!!! Thank you!!!!!
Gotta love pearson restating the book's confusing wording lmao
i still don't get it what the actual hell
kevinmathscience helped me
me too where did he got the values for the triangle sides😭
Excuse me, why is the hypotenuse always positive at the fourth quadrant(or any other quadrant)? Isn't tangent positive only in in the third quadrant?
so the hypothenuse is always positive because your hypothenuse is your "R" where as your adj is "X" and your opp is "Y"
Mans has a video for every possible precal problem! face reveal at 5 mill?
What do I do if I get like 27 degrees or 68 degrees what do I do then?
I felt smart for once, after watching this video 😆.
so much better than my teacher
how do you know which angle to do the sin, cos, tan, csc, sec, and cot from?
I don't get how to get the signs of each angle.. how can you determine in which quadrant if sin 270 is positive or negative
Because sin 270 lies in third qudrant where sin is negative ..sine angle positive in only first and second qudrant .so sin 270 is negative.
Where do you get the side lengths from???
Extremely helpful video. Thank you so much!
How do you know what the x, ys are to determine what sign they are?
You saved my life 💖
Why did you make the hypotenus which is r positive in quadrant 4?
Isn't x the only side positive?
@organic chemistry tutor
yes, perfection - amazing practivce!
thank you for posting. you explained everything clear and it is much appreciated.
good sir I appreciate you for making this! thank you so much!!
Now matter how many videos I watch on this do not understand it
You need escape velocity bruh
I hope u got it by now 😭
@@KatherineLee-ds2qn got it. My final for the class is on Wednesday need a 34% on it to pass woo!
If I can invent "immortal pills", you're the first person I will give one for free so you can live forever and teach us more because you're a better teacher and I've learned so much from you!! thanks for your hardworkkk!!❤
1:34 why root 3 is negative?
It is in the negative y or quadrant IV (+,-)
It's like a graph. The bottom is negative
luv you mr organic chemistry tutor
1:34 how we know the size of sides?
how do you know that the hypotenuse is 2? when my teacher does it he always puts one and I am really confused 😭
Sir quick question do I have rationalize the answer like -1/√2 to -√2/2 or can I just leave -1/√2
My mentor😌
7:26 can someone tell me why 2 is positive even though it's in the same quadrant as 1?
because 2 is the hypotenuse, and it’ll be positive
you are the goat bro
how would you know what degrees to pick? is it always on the x-axis the reference angle?
sir i love you so much right now
you're the best!!!!!!!!!!!!!!!!!!!
Sir from 3:28 - 4:42 I got the answer as root 3 and I think your answer is wrong because the question is find tan 7 pi/6 not tan pi/6
Thank you, very helpful
but now what if it isn’t one of those special triangles
Im having the same issue.
@@jmrc2908 Same. And my exam is tomorrow. Fuck my life.
The www.softschools.com/math/trigonometry/sum_and_difference_of_angles_identities/
@@إسماعيل-ط6خ3ض how’s life
ok guys its 2024 , its been 5 years did any of yall understood this?
What if you get a smaller negative degree? E.g cos(-15)? How would you make the triangle?
What do you mean by “rationalize it” , what’s wrong if we leave the answer as it is
How do you determine which angle triangle to use?
Thank you Sir I understand much better from you
This is actually really simple but I have to do these problems super fast so I won’t be able to take time to draw a graph. I’m just gonna have to memorize..
What if its like 45° that would be in the first quadrant correct?
What is rationalize 4:36
GOSH HE EXPLAİNS SO WELL
Thx so much very helpful video
My calculator was tempting me but i persevered
how do we know the values of hypotenuse and lengths of the triangle?
How about angles thats not land on special triangle?
Shukran brother
why did he use the co terminal for the 4pi/3?
What if the denominator is not 3,6, or 4 for the radians. For example, my professor gave me this problem: cos (-9 Pi/ 2). The way he explained it had me really lost but I know the answer is 0... but why?
Thanks a lot man
Bro saves my life,
but that's all are for special angle only.how about reference angle other than 45 and 60 ??
Why is it 60 degrees at 10:11 isn't it supposed to be 30 degrees since 270 - 240 is 30? and shouldn't it be in the other half of quadrant 2? Someone help I'm confused.
Edit: Lmao I'm still waiting for an answer. Please help me lol even if this is comment is posted a long time ago. 😞✊ 😂
reference angle is always between terminal array and x-axis either positive or negative
I was wondering the same @Erin David
9:44 TS
Why is the 2 not negative?
4:39 the answer should be the square root of 3 right?
It was rationalized. In order to remove the radical sign in the denominator, it was multiplied with a fraction which both numerator and denominator has the same value of the denominator of the previous fraction. So, numerator would be square root of three, while denominator would be 3 (square root of 3^2 is 3). Note that it is only rewritten, so the value doesnt change because it was basically multiplied to 1.
But the opposite would be root of negative 3 and adjacent would be negative one
Thank you sir...
I have a honours pre calc final tmr I need a 38 on this final exams to pass the class 😂 I have no idea what was going on this whole year despite trying so hard to understand.🤞🤞🤞
4:19 Why is 1 negative? I thought its in the third quadrant already?
because third quadrant have both negative, think it easy as first have all positive, second have a negative go first and a positive go second, next we have quadrant III with all negative and quadrant IV with a positive goes first and then a negative.
the coordinate goes as (x,y) when x is cosine(cos) and y is sine(sin)
Wait, why is 300 degrees associated with 60 degrees for Sin 300?
thank you so much