Question 1108624
<pre>{{{cos^""(x)/(1+sin^""(x))}}}

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

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

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

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

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

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

Edwin</pre>