Question

Prove the following identity:-

cos² A + tan² A-1
_____________ = tan ²A
sin²A

[Unnecessary answers will be reported]​

Answer 1

Step-by-step explanation:

cosx^2/sinx^2+tanx^2/sinx^2-1/sinx^2

cotx^2+1/cosx^2-1/sinx^2

cotx^2+secx^2-cosecx^2

-(cosecx^2-cotx^2)+secx^2

-1+secx^2=tanx^2. (secx^2-tanx^2=1)