Question

A+B+C=90 PROOF THAT COT A+ COT B +COT C=cotA*cotB*cotC

Answer 1

heya,,,,☺

A+B+C=90°

(A+B)=(90°-C)

cot(A+B)=cot(90°-C)

=)1-cotA*cotB/cotA+cotB=tanC

=)1-cotA*cotB/cotA+cotB=1/cotC

=)cotC-CotA*cotB*cotC= cotA+cotB

=)CotA+CotB+cotC=CotA+cotB+cotC. 【prooved】

hope it help you..

@rajukumar☺☺☺