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If f(x)=-(x^(3))/(3)+x^(2)sina.sin2a-5si...

If `f(x)=-(x^(3))/(3)+x^(2)sina.sin2a-5sin^(-1)(a^(2)-8a+17)`,then

A

`f(x)` is not defined at `x=sin 8`

B

`f'(sin8)gt0`

C

`f'(x)` is not defined at `x=sin8`

D

`f'(sin8),lt0`

Text Solution

Verified by Experts

The correct Answer is:
D
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