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Prove that ((cos A+cos B)/(sinA-sinB))^(...

Prove that `((cos A+cos B)/(sinA-sinB))^(n)+((sinA+sinB)/(cos A-cosB))^(n)`
`=2cot^(n)""(A-B)/(2)` or 0, accordingly as n is even or odd.

Text Solution

Verified by Experts

The correct Answer is:
`2cot^(n)((A-B)/(2))`
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