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If costheta+cos3theta+cos5theta+cos7thet...

If `costheta+cos3theta+cos5theta+cos7theta=0`, then general value of `theta` is:

A

`(npi)/(4)`

B

`(npi)/(2)`

C

`(npi)/(8)`

D

none of these

Text Solution

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The correct Answer is:
C
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