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If theta =(pi)/(2 ^(n) +1), then cos t...

If `theta =(pi)/(2 ^(n) +1),` then
`cos theta cos 2 theta cos 2^(2) theta …cos 2 ^(n-1)theta ` is equal to ................... A) `(1)/(2 ^(n))` B) `cos theta ` C) `2` D) `2^(n)`

A

`(1)/(2 ^(n))`

B

`cos theta `

C

`2`

D

`2^(n)`

Text Solution

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The correct Answer is:
A
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