Question 1205945
{{{(1/sin(x))^2(cos(x))^2}}}---------the lefthand side using definition cosecant

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

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

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

{{{csc^2(x)-1}}}-----------the righthand side