# Derivaties of trigonometric functions and natural logs.

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• November 22nd 2010, 06:11 PM
FullBox
I gave it a spin, but I'm not sure if I did it correctly. Here is my work.

http://oi55.tinypic.com/2qd4kqp.jpg
• November 22nd 2010, 06:20 PM
TheCoffeeMachine
Quote:

Originally Posted by FullBox
I gave it a spin, but I'm not sure if I did it correctly. Here is my work.

That's correct! (Clapping)

$\displaystyle \frac{d^2}{dx^2}\left[5x\cos(x^2)\right] = -30x\sin{x^2}-20x^3\cos{x^2}$.
• November 22nd 2010, 06:24 PM
FullBox
Thanks for all the help and patience man, I truly appreciate it!
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