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The value of tan alpha+2 tan (2 alpha)+4...

The value of `tan alpha+2 tan (2 alpha)+4 tam (4 alpha+….+2^(n-1) tan (2^(n-1) alpha)+2^n cot(2^n alpha)` is

A

`cot(2^n alpha)`

B

`2^n tan(2^n alpha)`

C

0

D

`cot alpha`

Text Solution

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The correct Answer is:
D
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