Calculus: Related Rates 3

[jayeeceekayow]

pause at 0.0 just before the clip starts and your heart will melt ~_~

[Ug0tMerced]

Two thumbs up! Keep it up!

[mooglefromcyrodiil45]

Lifesaver! Thank you for explaining these related rates...they seem less evil now.

[aparrotslife]

Thank you, sir, for your brilliant explanation. You are the model of all math teachers. :)

[soxpatsceltsrule]

thanks!

[siahralbany]

omg i just love the way u explain everything i had to drop calculas last semester but after following ur examples now i m having all A and B in the exams thank u sooooo much......

[pyr666]

you have made my life infinitely easier.

[NovaNation023]

boss

[karlkarlkarl1234]

MEOW

[emactan]

I began with tanθ = 2/x

x = 2/tanθ

x = 2cotθ

dx/dt = -2csc²θ dθ/dt

180 = -2csc²θ dθ/dt

dθ/dt = -180/(2csc²θ)

= -90sin²θ

in this solution x doesn't appear in the final equation

[karlkarlkarl1234]

How do you get the ^2 and pheta characters like that?? Did you just copy them off something?

[emactan]

I made an html document that lists common math symbols. For squared and theta I use the character entity references ² and θ respectively. I open the document on my browser and just copy and paste the symbols whenever necessary.

You can copy and paste from tlt. its. psu. edu/suggestions/international/­bylanguage/mathchart. html Remove the spaces from that link. There's a link for greek letters on that webpage as well.

[karlkarlkarl1234]

Awesome, thanks dude, that's a great help.

[darkcloud178]

thx for helping me cram for my exam

[HolycrapTER]

ugh these problems used to give me such a headache. this is really helpfull though! not like my calculus teacher at all haha...

[joanneli010]

you make it look so easy!!!

[nikdue22]

Thank you!

[marcusjhung]

good vid but im a bit confused

[j3a3d3e3]

this is great!! very helpful and very neat handwriting...believe it or not that is very necessary in keeping it all organized as i attempt these problems. THANKS!!!

[scilabo]

There will come a day when learning will not necessitate a classroom. THIS IS THE FUTURE!

[dual85]

absolutely

[chipboy7]

NICE VID. IT HELPED SO MUCH

[scubasteve1120]

thanks for the practice, what i would do is get the problem, do it on my own and then see if my answer matched. On this problem you forgot the negative till the end and it freaked me out for 15 minutes trying to find what i did lol. but in the end it was a lgood source for practice and explanations, thanks

[Alkinator47]

haha same until i saw ur comment

[SPBigJoe]

Thank god for MathTV and Youtube to host it

[Moriko9415]

thank you so much! ^^

[Gohon97]

These Calculus videos are awesome and they explain everything so well! However, I really don't see why you would want to know stuff like this type of a problem. I don't think that it really matters much if you do know the answer or not. However, these are great videos and they are helping me pass my Calculus class in High-School. Thank you very much for taking the time to explain how to do these problems.

[BigPurple121]

Related rate problems are important for chemistry & physics, at the higher levels. Engineering especially.

[grl021291]

thanks for the help.

im in high school taking calculus, and related rates threw me off.

im not sure were at this point with inverse tangent, but this truly helped.

THANK YOU

[and1skipp]

thankyou so much for all your related rates problems

i have a test in two days and your videos have helped a lot!

=]

[lgtakb]

oh nvm didnt see you divide it by 1/2 my mistake!

[lgtakb]

Good vid! Just one mistake tan (pi/3)=root3 not root3/2

[kyousukeX]

awesome!

[koerd85]

great calculus teacher , but needs to get a bigger chalk board lol

[Tubetascular]

yea taught at 12th grade AP calculus and first semester colleges.

[sporkism]

This guy is seriously legendary. My Trig teacher was so horrible that I stopped going to class and taught myself exclusively by watching these videos at my school's math center and following along.

[hknc]

very beneficial,thanks a lot :)

[anilatorA]

awsome awsome, brilliant man.

[graeme2oo6]

what age would this normally be taught at?

[arod889]

maybe 11th or 12th grade h.s.

[aeternuslibertas]

yea right....... 1st year College

[aeternuslibertas]

deffinately not 11 or 12 th grade in regular public schools

[arod889]

some A.P. calculus classes do, mines did(Central H.S. in philly)

[lucichrist]

I was sick during this lesson in Calc.. and I amm soooo glad this is on here Im in 12th and I love this guy.. LIFE SAVERRR

[maylien]

Much appreciated!

[pichricky]

Your explanation is clear and your lecture is helpful. Thanks for this video