A) \[2n\,\pi \]
B) \[n\,\pi +{{(-\,1)}^{n}}\,\,\frac{\pi }{4}\,\,-\,\,\frac{\pi }{4}\]
C) \[2n\,\pi +\frac{\pi }{2}\]
D) \[2n\,\pi +\,\,\frac{2\pi }{2}\]
E) None of these
Correct Answer: B
Solution :
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