Question

if 2tanx/1-tan^2x=1, then x can equal

Answer 1

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

hence, tan 2x = 1
2x = pi
x = pi/2.

Answer 2

Hello,

tan 2x=1
==>2x=(π/4+kπ)/2
==>x=π/8+kπ/2  (k integer)