If f(x) is cos x sin 3x then f' at (π/6) is a) 1/2 b) - √3 / 2 c) 0 d) 1 e) - 1/2

Question

If f(x) is
`cos x sin 3x` then f' at (π/6) is

a) 1/2
b) - √3 / 2
c) 0
d) 1
e) - 1/2

Answer 1

A) 1/2

Explanation: