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let k=tan^(-1)(("sin"(pi)/18+"sin"(2pi)/...

let `k=tan^(-1)(("sin"(pi)/18+"sin"(2pi)/18)/("cos(pi)/18+"cos"(2pi)/18))` then k equals

A

`(pi)/8`

B

`(pi)/12`

C

`(pi)/15`

D

`(pi)/4`

Text Solution

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The correct Answer is:
B
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