Question

Simplify [(1-cos(θ))(1+cos(θ))]/[(1-sin(θ))(1+sin(θ))]

A. sin2 Θ

B. cos2 Θ

C. tan2 Θ

D. cosine theta over sine theta

Answer 1

@amistre64

Answer 2

@phi

Answer 3

can you multiply the top ? what do you get ?

Answer 4

sin^2theta

Answer 5

you should get 1-cos^2(theta) which equals sin^2(theta)

what about the bottom ?

Answer 6

cos^2theta

Answer 7

I got it. Its tan^2theta. Thanks @phi