Question

tanx cosx-cos^2x=sin^2x

Answer 1

Som a proof?

Answer 2

\[\tan x \cos x-\cos^2x=\sin^2x \implies \\
\frac{\sin x}{\cos x} \cos x-\cos^2x=\sin^2x\implies
\]
That is the typical start of these, which you can see gets rid of the cosx, but what would you do next? I know what I would try, but where would you head?

Answer 3

And could you check to make sure you wrote the problem correctly? Just wondering about something.

Answer 4

ok