Question 1027158
{{{csc(x)-cos(x)cot(x)=sin(x)}}}
{{{1/sin(x)-cos(x)*(cos(x)/sin(x))=sin(x)}}}
Multiply both sides by {{{sin(x)}}},
{{{1-cos^2(x)=sin^2(x)}}}
{{{sin^2(x)+cos^2(x)=1}}}
True for all values of x.