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Prove that,(1 + "cos" pi/8)(1 + "cos" (3...

Prove that,`(1 + "cos" pi/8)(1 + "cos" (3pi)/8)(1 + "cos" (5pi)/8)(1 + "cos" (7pi)/8 ) = 1/8`

Text Solution

Verified by Experts

The correct Answer is:
`1/4. (1/sqrt2)^(2) = 1/8 = R.H.S`
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