`If A + B + C = pi " and " cos A = cos B cos C, "show that"`
`tan A = tan B + tan C`

If A + B + C = pi "and" cos A = cos B cos C, "show that" tan B tanC = 2

If A+B+C=pi and cos A= cos B.cos C prove that tan A= tan B+ tan C

If A+B+C=pi and cos A=cos B cos C then tan B tan C is equal to

If A+B+C=pi and cos A=cos B cos C then tan B.tan C is equal to

In a triangle ABC , if cos A = cos B cos C , what is the value of tan A- tan B - tan C ?

In a Delta ABC, if cos A=cos B cos C, what is the value of tan A-tan B tan C?

If cos (A + B) sin (C- D) = cos (A- B) sin (C+D) , show that : tan A tan B tanC + tanD=0 .

In a Delta ABC, if cos A=cos B cos C, what is the value of tan A-tan B-tan C?

If A + B + C = 180^(@) prove that: (i) "sin" (B+C-A) + "sin"(C+ A-B) + sin (A + B-C) = 4 sin A sin B sin C (ii) cos(- A+B+C) + cos (A - B + C) + cos (A + B - C) = 1 + 4 cos A cos B cos C (iii) "tan" (B+C - A) + tan (C+A-B) + tan (A + B-C) = tan (B+C - A) tan (C+ A - B) tan (A+B-C)