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If A, B and C be the angles of a triangl...

If A, B and C be the angles of a triangle, then which of the following is incorrect relation :

A

`"sin"(A+B)/(2)="cos"(C)/(2)`

B

`cos((A+B)/(2))="sin"(C)/(2)`

C

`tan((A+B)/(2))="sec"(C)/(2)`

D

`cot((A+B)/(2))="tan"(C)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
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