If sintheta=(1)/(sqrt(2)), then value of...

If `sintheta=(1)/(sqrt(2))`, then value of `3sin^(2)theta-4sin^(3)theta.costheta` is

A

`1/2`

B

`1/sqrt(2)`

C

`3/2`

D

`(-1)/(2)`

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The correct Answer is:

A

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