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Prove that, cos^(2)x+cos^(2)(x+(pi)/(3...

Prove that,
`cos^(2)x+cos^(2)(x+(pi)/(3))+cos^(2)(x-(pi)/(3))=(3)/(2)`.

Text Solution

Verified by Experts

The correct Answer is:
`3/2=R.H.S.`
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