#### Problem Statement: CE Board November 1995

What is the derivative with respect to x of 2 cos^2(x^2 + 2)?

- A. 2sin (x2 + 2) cos (x2 + 2)
- B. -2sin (x2 + 2) cos (x2 + 2)
- C. 8x sin (x2 + 2) cos (x2 + 2)
- D. -8x sin (x2 + 2) cos (x2 + 2)

#### Problem Answer:

The derivative is equal to **8xsin(x^2 + 2)cos(x^2 + 2)**

Solution:

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