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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""(A)/(2) * tan""(B+C)/(2) +cos""(A+B)/(2) *csc""(C)/(2)=`

A

1

B

2

C

0

D

3

Text Solution

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The correct Answer is:
B
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