Mine didn’t even explain it, he just threw us straight into it without explaining: Most Math teachers currently don’t know really anything about what they’re teaching
For those who are struggling with putting the last part in the calculator, I put it in as "cos-1(27/(5*square root 34 ))" with parentheses around the denominator as well
I HAVE to let you know how much your videos have helped me through pre calc. Its hard to understand my teacher sometimes, and your simplicity explaining everything has made it so much easier! Really appreciate you posting all these!! I'm sure they are helping others just as they helped me :)
2:17 best part of the video. ;-) as a recovering software engineer, i'm tutoring someone in this stuff and had to search the memory banks....or find this presentation.
@@tomscott3 How does someone take finals 4 weeks ago...is that like short semester or something? Also, if they were up at 2am with an exam at 8am, I'm guessing it did not go well.
1:18 This confused the hell out of me until I realised that the equation looks the same when you both multiply a and b by themselves, and multiple a and b together
You are the best math teacher I never had. I watch your videos all the time to get me through me math homework. I am going to school for Aerospace engineering and you have helped me through my exams numerous times. I love your videos, you are so helpful, thank you so much!
You are a life saver honestly I owe you my grade “A” (: thank to you and your videos. Keep making more you will help other like me. And who knows I might keep watching your videos in the future 😁
The example is quite confusing because the way the dot product is made is not clear: with the values: u = = v = = the dot product being: u.v = 4*3+3*5 it could mean: u.v = a.b+c.d or u.v = a.c+b.d Would have been great to choose an example where the values of "b" and "c" are different...
i see people saying their teachers didn't teach this, while I'm just here cause i forgot the difference between the like 10 different formulas I'm learning with vectors lol
Oh man, I’m just skipping every other video at the top of whatever dumb search engine I’m on to find these videos. Nothing comes close, and certainly not my own teacher.
My TI84 cant do the cos^-1(27/5sq34) !!! Any suggestions on what to do to the calculator? Also, can someone help me with this problem? u = and ?? I keep getting -78/50 BUT my calculator can not do cos^-1 (-78/50)
Why did it take our teacher 45 minutes to NOT explain this, but this guy got it in under 3 minutes
My teacher take 1 hour to NOT explain this 🥲
Maybe it’s a review?
Mine didn’t even explain it, he just threw us straight into it without explaining: Most Math teachers currently don’t know really anything about what they’re teaching
For those who are struggling with putting the last part in the calculator, I put it in as "cos-1(27/(5*square root 34 ))" with parentheses around the denominator as well
Thank you so much!! I was wondering why it wasn't working!!
Godsend🙏
Thank you!! I was freaking out
oml thank you
It was driving me crazy trying to figure out how to put it in thank you!
ngl just watched this to find out how to calculate the angle between 2 points in minecraft so i can make a straight tunnel ... good vid though
This dude looks like a super villan...or Pitbull
haha
@Christian Hayden what you want him to say
more like jonny sins
make math SeXy again
He's Lex Luther...🤔 no wonder...
I HAVE to let you know how much your videos have helped me through pre calc. Its hard to understand my teacher sometimes, and your simplicity explaining everything has made it so much easier! Really appreciate you posting all these!! I'm sure they are helping others just as they helped me :)
This man has been consistently saving my life in math for like 7 years
Seriously from freshman year of high school and now my junior year of college😂
2:17 best part of the video. ;-)
as a recovering software engineer, i'm tutoring someone in this stuff and had to search the memory banks....or find this presentation.
awesome! Let me know if I can do anything else to help you along
vry good math video so tnx and rspct from pakistan i hope u r ok but from where are you.
How to add u v.. that means u+v
Watching this at 2am and tomorrow at 8am my final exam :(( Pray for me all!
haha. how'd it go?
@@tomscott3 How does someone take finals 4 weeks ago...is that like short semester or something?
Also, if they were up at 2am with an exam at 8am, I'm guessing it did not go well.
@@ralphdennis787 my uni has finals at the end of every quarter. we take three courses per quarter so I guess they do the same
"Okay.....so much for that video now" HAHAHAHA
what happened?
Brian McLogan You told that to one of your students who got in the way of the camera lol
@@brianmclogan 2:18
1:18 This confused the hell out of me until I realised that the equation looks the same when you both multiply a and b by themselves, and multiple a and b together
Your videos have helped me so much over the past few years thank you so much for posting these for free
You are such a brilliant lifesaver. Thank God for you and your channel!
Thank you for posting this. I was not getting it at all!
These students are very lucky to have you.
U make it much easier to understand than a lot of my professors; preciate the content
You are the best math teacher I never had. I watch your videos all the time to get me through me math homework. I am going to school for Aerospace engineering and you have helped me through my exams numerous times. I love your videos, you are so helpful, thank you so much!
Yeah same here. I'm trying to get an associates for aerospace engineering
You are a life saver honestly I owe you my grade “A” (: thank to you and your videos. Keep making more you will help other like me. And who knows I might keep watching your videos in the future 😁
you are very welcome! happy to be there for you!
Shout out to the kid that wanted to be in the vid 😂
many thanks from Romania ,helped a lot.
Our country's Maths teachers are best. Love my Indian maths.
You are the GOAT.
I calculate this way Arctan(5/3) - Arctan(3/4) = 22.16634.... Angle - angle is the answer.
Very nice teaching 😄😄
bro ur litterally helping me pas pre cal
what if one of the vectors was negative what would u do then
Tnk u for the vid. Now I can easily do my homework
awesome! happy to be able to help
Taking my final right now, and my teacher left the room, thank you this video saved my ass, I completely forgot the formula.
@TheFreerunner lol, my teacher doesnt really care if we use our phones.
wtf
Thanks Brian McLogan with my Trigonometry.
9 years and i study this for my exams thanks bro
never was explained in my class, but thank you.
can you please explain how you plugged it into the calculator my calculators on degrees and when i plugged in cos^-1(27/5 invrese34) it doesnt work
cos^-1(27/(5sqrt(34)))
Brian McLogan That still didn’t work for me!
You look and sounds like mr. Lundy from young sheldon, that's what fun watching you teaching
Got everything until it was time to put it in the calculator
Sabrina Succes have you figured out how to do it? Damn I’m still stuck at the last step trying to find the answer from calculator
Vivian Liu she probably figured it out its been 2 years
@@yj.l7934 did you figure it out? Am also stuck at this.
you saved me! i really appreciate your teaching
thaaannnnkkkk you. I was getting frustrated cuz i could'nt get it :)
dude looks like a badass. Awesome video.
haha appreciate it
This guy saved my ass like 9 times lol
Great video!!
appreciate it
2:17 hello habibi 😍😂🥺
1:55 me
haha
nice
you are always late like me 😂
Thanks for saving my ass for today's math test
thank you for educating me for free while my college professor teaches like its ASMR
Thank you sir ❤
Very helpful. Thank you
Super helpful, thank you!
when ever i plug that last part in my calculator gives me a domain error. what is causing that?
you must be typing it in your calculator wrong, make sure you use parenthesis
@@brianmclogan actually its probably getting a domain error because he didn't switch from radians to deg or vice versa...?
Thank you soooooo much Mr. McLogan!!!!
+Denesha Roberts you are very welcome! happy to help
Where this formula came from? That was what I'm looking for.
The example is quite confusing because the way the dot product is made is not clear:
with the values:
u = =
v = =
the dot product being:
u.v = 4*3+3*5
it could mean:
u.v = a.b+c.d
or
u.v = a.c+b.d
Would have been great to choose an example where the values of "b" and "c" are different...
If anybody is confused by this, here's the solution for the dot product:
u.v = u.x * v.x + u.y * v.y
Thank you! I was just about to make the mistake of thinking that
Should have been obvious but it's easy to overlook things
Could you please explain how cosine inverse comes ?
thanks , its now much easy
Thank you 🙏🏽🙏🏽🙏🏽
is the answer in radians or degrees ?
Awesome! Thanks.
When finding the dot product did he do, x1 * y1 or x1 * x2? because both points have the number 3
He chose a poor example, since they both look like you are multplying x*y, but it is x1 *x2
not all hero wear cape......
i see people saying their teachers didn't teach this, while I'm just here cause i forgot the difference between the like 10 different formulas I'm learning with vectors lol
Haha
please teach at my high school
Great content!!!!
thank you!
i understand know thank you so much
Thanks and again thanks
Sir, cant we find without calculator or any other way ?
yes you can use the unit circle if your angle has a point there
awesome
Oh man, I’m just skipping every other video at the top of whatever dumb search engine I’m on to find these videos. Nothing comes close, and certainly not my own teacher.
My TI84 cant do the cos^-1(27/5sq34) !!! Any suggestions on what to do to the calculator?
Also, can someone help me with this problem? u = and ?? I keep getting -78/50 BUT my calculator can not do cos^-1 (-78/50)
Thank you Sir....
Thanks so much
but noone on the internet tells WHY the formula works, eventhough its not that hard to explain
Omg thank you so much I understand this 🎉🤍
Sir, I am having problem in finding. Will you please solve this for me? Ex.Find the angle between vectors A=-2i+3j+k and B=i+2j-4k. Please....
Sorry I am am unable to work on additional problems as I receive a lot of requests and am preparing for next year
cos^(-1) [(2*1)+(3*2)+(1*(-4))]/(sqrt(13)*sqrt(21) = 75.99°
Sub 1 in for K and I and do the same as the video.Its no different with 3 values
Your angle is 81.90 degree
Ive tried putting it into the calculator many times but it always says domain error
nevermind I got it
awesome!
awesome sir
happy to help
you seem like a cool dude
holy shit, found Randy Orton again
Love from INDIA
😍
why am I getting an error?
thank you agent 47
thank youu you should see the example my teacher did lol
Thanks for the help, nearly got confused by mag of u, looks a little like w, other than that great vid
happy t help you out!
thank you, sir
1:56 oof
fr man got the shoo motion
thank you so much!
you are very welcome!
Thank you!!
you are very welcome!
What if you didn't have a calculator?
2:17 be like
why does my teacher complicate something so simple
thanks!
It's funny at 2:18
Thank you Johnny Sins
oh so the 5 came out of no where just like that BAM!
Mouza Almazrouei the 5 came from finding the magnitude of U
@@Cesarhbb. lol some people are like that; they get lost in the explanation (somehow) and then dont know why there is a 5 there.
Thankyou sir
you are very welcome!
lifesaver
happy to help
tyvm
you are very welcome!
thx
Thanks
happy to help
No problem.
Thank u
you are very welcome!
hey guy at 2:18
anyone who knows how to find the inverse cosine without a calculator?