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cos(pi/14) + cos ((3pi)/14) + cos((5pi)/...

`cos(pi/14) + cos ((3pi)/14) + cos((5pi)/14)`=

A

`1/2tan(pi/14)`

B

`1/2cos(pi/14)`

C

`1/2cot(pi/14)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

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