The function f(x) =4sin^(3)x-6sin^(2)x +...

The function f(x) `=4sin^(3)x-6sin^(2)x +12 sinx + 100` is strictly

A

Increasing in `(pi, (3pi)/(2))`

B

Decreasing in `(pi/2,pi)`

C

Decreasing in `[(-pi)/(2), pi/2]`

D

Decreasing in `[0, pi/2]`

Verified by Experts

The correct Answer is:

B

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