If `A + B + C = pi`, prove that `tan3A + tan3B + tan3C = tan3A*tan3B*tan3C`

If A+B+C= pi , prove that tan A+tan B+tan C= tanA tan B tan C

If A + B + C = 180^(@) , then prove that tan A + tan B + tan C = tan A tan B tan C.

If A+B+C= pi/2 , prove that tan A tan B+tan B tan C+tan C tan A=1

tan A+tan B+tan C=

underset tan A If A+tan B+tan C=tan A*tan B.tan C

If A+B+C=pi, prove that (tan A)/(tan B tan C)+(tan B)/(tan Atan C)+(tan C)/(tan A tan B)=tan A+tan B+tan C-2cot A-2cot B-2cot C

(a) tan A+tan B+tan C=tan A tan B tan C

If A+B+C= pi prove that tan B tan C+tanc tan A+ tan A tan B =1 +sec A.secB sec C.

underset tan If A+tan B+tan C=tan A tan B tan C

if A+B+C= pi Then value of tan(3A) +tan(3B) + tan(3C) is