Question

senx+cosx/senx=1/1 + tanx

Answer 1

(senx - cos x) / senx = 1- 1/tan x o sirve(senx + cos x) / senx = 1+ 1/tan x 
(senx + cos x) / senx = 1+ 1/tan x senx/senx + cosx/senx= 1+ 1/tan x 1 + cosx/senx= 1+ 1/tan x 1+cotx= 1+ 1/tan x 1+ 1/tan x = 1+ 1/tan x