4 4f B+ cotBes le +eolcestr =34‘9/&-' ही जे 33 हू कह – InterviewSolution

1.

4 4f B+ cotBes le +eolcestr =34‘9/&-' ही जे 33 हू कह

Answer»

A + B = 180-Ctake tan of both sides(tan A + tan B)/(1-tan A tan B) = - tan Cor

tan A + tan B + tan C = tan A tan B tan C

dividing both sides by Tan A tan B tan C

We get 1/tan B 1/ tan C + 1/tan A 1/ tan C + 1/ tan A 1/tan B = 1or cot B cot C+ cot A cot C + cot A cot B = 1

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