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If ABCD is a cyclic quadrilateral, then ...

If ABCD is a cyclic quadrilateral, then `cos A + cos B ` is equal to............. A) 0 B) `cos C + cos D` C) `- (cos C+ cos D)` D) `cos C- cos D`

A

0

B

`cos C + cos D`

C

`- (cos C+ cos D)`

D

`cos C- cos D`

Text Solution

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The correct Answer is:
C
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