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If n is an odd positive interger, then ...

If n is an odd positive interger, then
`((cosA+cosB)/(sinA-sinB))^(n)+((sinA+sinB)/(cosA-cosB))^(n)=`

A

`2tan^(n)""(A - B)/2`

B

`2cot^(n)""(A - B)/2`

C

1

D

None of these.

Text Solution

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The correct Answer is:
B
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