Math, asked by ayan6134, 1 year ago

cosA + cos B+ cos C+ cos D=0.

Answers

Answered by diya654321

1

cosA+ cosB+ cosC+ cosD=0

cos(A+B+C+ D)=cos90 degree

A+B+C+D=90degree

ayan6134: thanks

diya654321: wlc

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