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If A,B,C,D are the successive angles of ...

If A,B,C,D are the successive angles of a cyclic quadrilateral, then-
(i) `cos((A+C)/2) + cos((B + D)/2)` =

A

1

B

`-1`

C

0

D

2

Text Solution

Verified by Experts

The correct Answer is:
C
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