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Let f(theta) =sin theta(sin theta + sin3...

Let `f(theta) =sin theta(sin theta + sin3theta)` then `f(theta)` :

A

`gt= 0` only when `theta gt= 0`

B

`lt= 0` for all real `theta`

C

`gt= 0``theta`

D

`lt= 0` only when`theta lt= 0.`

Text Solution

Verified by Experts

The correct Answer is:
C
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