Question 1202473
{{{tanx/(1+tanx)}}}


{{{(sinx/cosx)/(1+sinx/cosx)}}}


{{{((sinx/cosx)/(1+sinx/cosx))((cosx/sinx)/(cosx/sinx))}}}


{{{((sinx/cosx)(cosx/sinx))/((1+sinx/cosx)(cosx/sinx))}}}

and this should be enough for you to continue, and to finish.