Question

simple trig proof?? (sorry i'm so bad at these...)

tan^2(x)= 1-cos(2x)/1+cos(2x)

Answer 1

r.h.s = 2sin^2 (x) / 2 cos^2 (x)
= 2 tan^2 (x)

Answer 2

oh sry no 2

Answer 3

no 2 where?

Answer 4

in the answer...there should be no 2

Answer 5

r.h.s = 2sin^2 (x) / 2 cos^2 (x)
= tan^2 (x)