Question

(1+Tan(x))/(1+Cot(x))=(1-Tan(x))/(Cot(x)-1)

Trig identity Question

Answer 1

\[\frac{ 1+\tan(x) }{ 1+Cot(x) }=\frac{ 1-Tan(x) }{ Cot(x)-1 }\]

Answer 2

from the left hand side, do as you did in previous post, you get tan x , then do something like this