Question 974152
Do you mean this?
{{{(Sinx+tanx)(sinx/(1+cosx))=sinx*tanx}}}


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


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


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


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


Try  multiplic by  {{{(1-cos(x))/(1-cos(x))}}}.


{{{(sin(x)cos(x)+sin(x))/(1+cos(x)))((1-cos(x))/(1-cos(x)))*tan(x)}}}


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


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


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


{{{((sin(x)-sin(x)cos^2(x))/sin^2(x))*tan(x)}}}


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


{{{(sin(x)*sin^2(x)/sin^2(x))tan(x)}}}


{{{(sin(x)*cross(sin^2(x))/cross(sin^2(x)))tan(x)}}}