Question 971383
Starting with the left hand side,


{{{(cos(x)/(1-sin(x)))((1+sin(x))/(1+sin(x)))}}}----required a fair bit of thinking to choose this


{{{(cos(x)(1+sin(x)))/(1-sin^2(x))}}}


{{{(cos(x)(1+sin(x)))/cos^2(x)}}}


Cancelation of cosine over cosine,


{{{(1+sin(x))/cos(x)}}}


{{{1/cos(x)+sin(x)/cos(x)}}}


...!