Question

In 4 steps, prove (sec x+tan x)(1-sin x/cos x)=1

I know how to do it in 3 steps but not 4 :/ and it has to be in 4 steps.

Answer 1

1st step
sec(x)=1/cos(x)
second step
tan(x)=sin(x)/cos(x)
third step take LCM as cos(x)
(1+sin(x)/(cos(x))*(1-sin(x)/(cos(x)
and from here step 4 is
http://openstudy.com/users/timmtamm96#/updates/50142efce4b0fa246730ac8f