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If a = cos2alpha+isin2alpha , b= cos2 ...

If `a = cos2alpha+isin2alpha , b= cos2 beta + i sin2 beta, c=cos2 gamma +isin2 gamma` then prove that
`sqrt(abc)+(1)/(sqrt(abc))=2cos (alpha + beta+ gamma)`

Text Solution

Verified by Experts

The correct Answer is:
`therefore sqrt(abc)+(1)/(sqrt(abc))=2 cos(alpha+beta+gamma)`
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