If 3 cot A = 4, check whether

Murali · April 1, 2019, 5:22am

If 3 cot A = 4, check whether $\frac { 1-tan^{ 2 }A }{ 1+tan^{ 2 }A }$ = cos² A – sin² A or not.

Murali · April 1, 2019, 5:23am