Question

Help please !!

33.

Answer 1

@mathmale i got stuck

Answer 2

Let's see whether we can get you unstuck.

Find the derivative with respect to x of \[y=8\cos ^{-1}u.\]

Answer 3

Note that because u is itself a function of x, you MUST apply the chain rule. You didn't do that in the work you've shared with me.

Answer 4

im confused D:

Answer 5

@mathmale

Answer 6

I'm sorry, Marcelie, but I'm going to have to stop now, but I could possibly (no promise) continue to help you tomorrow morning.

I take it you have studied the Chain Rule some. It's the Chain Rule causing you problems here.

Again, please differentiate the following with respect to x, remembering that u is a separate function of x and therefore must also be differentiated:

Answer 7

yes chain rule