Question 970132
{{{sin(x)cos(x)(sin(x)/cos(x)+cos(x)/sin(x))}}}


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


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


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


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