Question

please help me in solving the problem of trigonometry​

Answer 1

Step-by-step explanation:

1-cos@/1+cos@=(1-cos@)(1+cos@)/(1+cos)^2

=1-cos^2 @/(1+cos@)^2

=sin^2 @/(1+cos@)^2

√(1-cos@/1+cos@) =√sin^2 @/(1+cos@)^2

=sin@/1+cos@