Question 910270
Use substitution until you get the terms on the left hand side to equal terms on the right hand side.
{{{cos(x)cot(x) + sin(x) = csc(x)}}}
{{{cos(x)(cos(x)/sin(x)) + sin(x) = 1/sin(x)}}
Multiply both sides by {{{sin(x)}}}}.
{{{cos^2(x)+sin^2(x)=1}}}
You know that this is true so the identity is also true.