differentiation

Question: The length of the longest interval, in which the function $3\sin x-4\sin x$ is increasing, is



1) $\frac{\pi }{3}$
2) $\frac{\pi }{2}$
3) $\frac{3\pi }{2}$
4) $\pi $
Solution: Explanation: No Explanation
Increasing and Decreasing function

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