Question 1079880
<pre>
{{{(1-cos^""(x))/(1+cos^""(x))}}}{{{""=""}}}

{{{expr((1-cos^""(x))/(1+cos^""(x)))*expr((1-cos^""(x))/(1-cos^""(x)))}}}{{{""=""}}}

{{{(1-2cos^""(x)+cos^2(x))/(1-cos^2(x))}}}{{{""=""}}}

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

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

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

{{{csc^2(x)}}}{{{""-""}}}{{{2(cos^""(x)/(sin^""(x)sin^""(x)))}}}{{{""+""}}}{{{cot^2(x)}}}{{{""=""}}}

{{{csc^2(x)}}}{{{""-""}}}{{{2(1*cos^""(x)/(sin^""(x)sin^""(x)))}}}{{{""+""}}}{{{cot^2(x)}}}{{{""=""}}}

{{{csc^2(x)}}}{{{""-""}}}{{{2(1/sin^""(x))*(cos^""(x)/sin^""(x))}}}{{{""+""}}}{{{cot^2(x)}}}{{{""=""}}}

{{{csc^2(x)}}}{{{""-""}}}{{{2csc^""(x)*cot^""(x)}}}{{{""+""}}}{{{cot^2(x)}}}{{{""=""}}}

{{{(csc^""(x)^""-cot^""(x))^2}}}

Edwin</pre>