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If A, B, C are the angles of a triangle ...

If A, B, C are the angles of a triangle then `tan ((B+C)/2)=`

A

`sin""(A)/(2)`

B

`cot""(A)/(2)`

C

`cos""(A)/(2)`

D

`sec""(A)/(2)`

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The correct Answer is:
b
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