Question

Prove: tan2 θ•cos2 θ + cos2 θ = 1.

Answer 1

can you post the answer

Answer 2

that isn't an identity

do you mean instead tan^2(x)*cos^2(x)+cos^2(x)=1?

Answer 3

you know where x is theta

Answer 4

Why are my replies not good enough to help you?

http://openstudy.com/users/danmcz#/updates/553faa59e4b0cdd5b3a96f34

Answer 5

actually @geerky42 basically gave you every step

Answer 6

you just have to use the pythagorean identity he mentioned earlier in that thread

Answer 7

sorry is the last assignment i just the final answer

Answer 8

I pretty much gave you answer in last thread. I showed you a way to prove it.