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If n is an integer, which of the followi...

If n is an integer, which of the following is correct ?

A

`tan (npi+ alpha) =-tan alpha`

B

`tan (npi+ alpha)= (-1 ^(n)) tan alpha`

C

`tan (n pi + alpha)= cot alpha`

D

`tan (n pi+ alpha)= tan alpha`

Text Solution

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The correct Answer is:
D
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