Thread: Differentiation

1. Differentiation

Rules of differentiation to find the derivative of the function.
pie/2 sin x - cos x
Not sure what to use here.

2. Originally Posted by Nightasylum
Rules of differentiation to find the derivative of the function.
pie/2 sin x - cos x
Not sure what to use here.
Im getting the answer to be pie/2 cos x + sin x but idk if thats right because what if i just change the sin x to cos x wouldnt they cancel, im so confused.

3. You're thinking that:
$\displaystyle \frac d {dx}\left({\frac {\pi} 2 \sin x - \cos x}\right) = \frac {\pi} 2 \cos x + \sin x$?

Well, you're right.

Diff of sine is cos, diff of cos is -sine, diff of a constant times a function is the constant times the diff of the function. Good job.

4. Originally Posted by Matt Westwood
You're thinking that:
$\displaystyle \frac d {dx}\left({\frac {\pi} 2 \sin x - \cos x}\right) = \frac {\pi} 2 \cos x + \sin x$?

Well, you're right.

Diff of sine is cos, diff of cos is -sine, diff of a constant times a function is the constant times the diff of the function. Good job.

Ok great can you help me with 1 more.
6 square root of X+5 Cos X
so I think I can change the form to X ^(1/6) + 5 -sin X Help ??? haha