answersLogoWhite

0

(1 - tan2x)/(1 + tan2x) = (1 - sin2x/cos2x)/(1 + sin2x/cos2x)

= (cos2x - sin2x)/(cos2x + sin2x)

= (cos2x - sin2x)/1 = (cos2x - sin2x) = cos(2x)

User Avatar

Wiki User

11y ago

What else can I help you with?