Solving Second Derivative of sin (2x)^1/2

[athamz]

Second Derivative

Homework Statement

f(x) = sin (2x)^1/2 find the f"(x).

Homework Equations

The Attempt at a Solution

I don't know homework to do it...

 

[Oster]

How about the chain rule?

 

[nickalh]

Why not start by showing us what you do know?

At least pretend we have,
g(w) = w^(1/2).
How would you find the derivative?
The second derivative?

How have you been taught the chain rule? Can you show us a simpler example you've worked?

Also, read
https://www.physicsforums.com/showthread.php?t=414380
particularly the 2nd and 4th paragraphs underneath Homework Help.