trigonometry

Question: The period of $f(x)=\sin \left( \frac{\pi x}{n-1} \right)+\cos \,\left( \frac{\pi x}{n} \right)\,\,,\,n\in Z$ , $n>2$ is

1) $2\pi n(n-1)$

2) $4n\,(n-1)$

3) $2n\,(n-1)$

4) None of these

Solution:

Explanation: No Explanation

Periodic trigonometric functions

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