Asked by Binoy kumar mahato
cos(A-B)+cos(B-C)+cos(C-A)=-3/2 then prove that cos A+cos B+cos C=0 and sin A+sin B+sin C=0 and also prove that cos(A-B)=cos(B-C)=cos(C-A)=-1/2
Answers
Answered by
Steve
As I said before,
https://www.jiskha.com/display.cgi?id=1507264737
https://www.jiskha.com/display.cgi?id=1507264737
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