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I: If A,B,C,D are angles of a cyclic qua...

I: If A,B,C,D are angles of a cyclic quadrilateral then ` cos A + cos B + cos C + cos D=0`
II : If `A,B,C,D` are the angles of a quadrilateral then ` cos""(A+B)/(2) + cos""(C+D)/(2) =0`

A

only I is true

B

only II is true

C

both I & II are true

D

neither I nor II are true

Text Solution

Verified by Experts

The correct Answer is:
C
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