- #1
Heat
- 273
- 0
Homework Statement
Find d^2y/dx^2.
y = x cos x
The Attempt at a Solution
I've been doing derivatives recently and now got into doing them with trig functions.
I thought it was,
y = x cos x = -xsinx = -xcosx
but that is the derivative of the derivative.
The problem asks for d^2/dx^2.
Can someone explain what to do in this situation?
What is the difference of dx/dy, d^2y/dx^2, dy^2/d^2x, etc...
Please and thank you.