Question

prove that : (1+ tan² θ) (1- sin θ) (1 +sin θ) /sec²θ=cos²θ

Answer 1

Step-by-step explanation:

(1+tan^2a) = sec^2a

(1-sin^2a) = cos^2a

(a+b) (a-b) = a^2-b^2

which implies

sec^2a ( 1- sin ^2a)/sec^2a

from above equation

(1- sin^2a) = cos^2a

hence proved