# Common derivatives challenge

Review your understanding of the derivatives of sin(x), cos(x), eˣ, and ln(x) with some challenge problems.

### Problem

Given f, left parenthesis, x, right parenthesis, equals, 6, cosine, x. What is the value of f, space, prime, left parenthesis, start fraction, pi, divided by, 3, end fraction, right parenthesis, space?
Please choose from one of the following options.