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Let f(theta)=sin theta(sin theta+ sin 30...

Let `f(theta)=sin theta(sin theta+ sin 30)` then `f(theta)`

A

`ge0` only when `theta ge0`

B

`le0` for all real `theta `

C

`ge0` for all real `theta `

D

`le0` only when `theta le 0`

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The correct Answer is:
C
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