Math, asked by astudas6642, 1 year ago

if ABCD are angles of a cyclic quadrilateral cosA + cosB + cosC + cosD

Answers

Answered by Brainly1312

2

Answer:

0

Step-by-step explanation:

A+C=B+D=180; SINCE CYCLIC QUADRILATERAL

=>cosA=-cosC,

AND, cosB=-cosD,

=>cosA+cosB+cosC+cosD=0

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