1.

Let f(x)=2sin^(3)x-3sin^(2)x+12sinx+5,0lexlepi//2 .Then f(x) is

Answer»

DECREASING in `[0,pi//2]`
INCREASING in `[0,pi//2]`
increasing in `[0,pi//4]` and decreasing in `[pi//4,pi//2]`
increasing in `[0,pi//4]`

ANSWER :B


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