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If "Cos"^(-1)P/a+"Cos"^(-1)q/b=alpha, th...

If `"Cos"^(-1)P/a+"Cos"^(-1)q/b=alpha`, then prove that
`(p^(2))/(a^(2))-(2pq)/(ab).cos alpha+(q^(2))/(b^(2))=sin^(2)alpha`

Text Solution

Verified by Experts

The correct Answer is:
`1-cos^2alpha=sin^2 alpha`
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