Question

How do you prove `(1 - sin2x) / (cos2x) = (cos2x) / (1 + sin2x)`?

Answer 1

Prove trig equation.

Explanation:

Prove by cross multiplication:
`cos^2 2x = (1 - sin 2x)(1 + sin 2x)`
`cos^2 2x = (1 - sin^2 2x)`
This is a popular trig identity.