If tan A= (1- cos B)/(sin B), then tan ...

If `tan A= (1- cos B)/(sin B),` then `tan 2A` is equal to

A

`tan B`

B

`tan ^(2)B`

C

`tan ^(2) B+2 tan B`

D

`tan B+2 tan B`

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The correct Answer is:

A

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