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Show that: cos(2tan^(-1)1/7)=sin(4^(-1)1...

Show that: `cos(2tan^(-1)1/7)=sin(4^(-1)1/3)`

A

`1/2`

B

`-1/2`

C

0

D

1

Text Solution

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The correct Answer is:
A, B, C, D
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