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If sin A = n sin B then (n-1)/(n+1) tan ...

If `sin A = n sin B` then `(n-1)/(n+1)` tan `(A+B)/(2)` is equal to

A

sin `(A-B)/(2)`

B

tan `(A-B)/(2)`

C

cot `(A-B)/(2)`

D

None of these

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IPUCET PREVIOUS YEAR PAPERS-GGSIPU MATHEMATICS 2008-MCQs
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