Ex-8.1|Q-8| If 3 cot A = 4, check whether 1−tan^2A/1+tan^2A = cos² A – sin² A or not. #trigonometry

If 3 cot A = 4, check whether 1 - tan ^2A/ 1 + tan A^2 = cos2 A – sin2 A or not

If 3 cot A = 4, Check whether 1- tan²x/1+ tan²x = cos²A - sin²A or not.