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sandy524
 3 years ago
find the derivative of f(x) = 3x cos 6x .
sandy524
 3 years ago
find the derivative of f(x) = 3x cos 6x .

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Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0\[\frac{d}{dx}3xcos6x\] Do you know the product rule?

Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0So, what have you done?

sandy524
 3 years ago
Best ResponseYou've already chosen the best response.0but how would i use it in this case

Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0Where are you having problems?

sandy524
 3 years ago
Best ResponseYou've already chosen the best response.0may someone please show me step by step how to do this. my professor sucks and is currently being investigated by the math dept here because of it so yeah...

tinagca
 3 years ago
Best ResponseYou've already chosen the best response.0Here is a great site to help you with your math! www. mathway.com! :)

tinagca
 3 years ago
Best ResponseYou've already chosen the best response.0That site will provide you with a step by step! :D

sandy524
 3 years ago
Best ResponseYou've already chosen the best response.0mathway is not credible

Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0Well, have you atleast tried it?

tinagca
 3 years ago
Best ResponseYou've already chosen the best response.0How i learn a lot from that site...

tinagca
 3 years ago
Best ResponseYou've already chosen the best response.0You just have to sign up to get the step by step part!! :) It helps me a ton...

sandy524
 3 years ago
Best ResponseYou've already chosen the best response.0i have missed many questions from its wrong answers. wolframalpha is more reliable

tinagca
 3 years ago
Best ResponseYou've already chosen the best response.0Okay. maybe you just type them in wrong... it always helps me :D

tinagca
 3 years ago
Best ResponseYou've already chosen the best response.0I dont use it for tests though... i use it for help... you use it for tests?

sandy524
 3 years ago
Best ResponseYou've already chosen the best response.0okay sure but anyways thanks bye. now back to the question i need help with

Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0@tinagca: Please don't divert people to another site; when someone is trying to help them.

tinagca
 3 years ago
Best ResponseYou've already chosen the best response.0I was trying to give her a step by step site :o

Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0That was retarded; interjecting out of the blue.

sandy524
 3 years ago
Best ResponseYou've already chosen the best response.0please folks i really need help the bantering can be spared

tinagca
 3 years ago
Best ResponseYou've already chosen the best response.0Oh shut up. like seriously i was trying to help then you guys started being rude. So whatever, a simple thank you and just saying " Oh i already tried that site" would have been fine.

sandy524
 3 years ago
Best ResponseYou've already chosen the best response.0thank you zepdrix u are always so helpful

zepdrix
 3 years ago
Best ResponseYou've already chosen the best response.1so do it piece by piece :) We have a (3x)', what is the derivative of 3x? :D

zepdrix
 3 years ago
Best ResponseYou've already chosen the best response.1ok cool, so the first term will simplify to (3)(cos6x). Hmm now we have a (cos6x)' on the right side. We'll take the derivative of the outermost function (cosine) Then "chain" (multiply by the derivative of the inside (6x)' ) So whats the derivative of cos6x? :D

tinagca
 3 years ago
Best ResponseYou've already chosen the best response.0You should give @zepdrix a medal @sandy524 ...i mean, that was a great answer!

tinagca
 3 years ago
Best ResponseYou've already chosen the best response.0:) I gave you a medal! :D

sandy524
 3 years ago
Best ResponseYou've already chosen the best response.0ok so after that what do we do

zepdrix
 3 years ago
Best ResponseYou've already chosen the best response.1Just combine the pieces together and simplify :D So far we've figured out that the derivative is (3)(cos6x) + (3x)(6sin6x) =3cos6x 18xsin6x Make sense? :D
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