Question 1202938
<pre>
{{{cos(2theta) + sin(theta)= 0}}}
{{{1-2sin^2(theta)+sin^""(theta) = 0}}}
{{{-2sin^2(theta)+sin^""(theta)+1 = 0}}}
{{{2sin^2(theta)-sin^""(theta)-1 = 0}}}
{{{(2sin(theta)+1)(sin(theta)-1) = 0}}}
{{{2sin(theta)+1=0}}}; {{{sin(theta)-1=0}}}
{{{2sin(theta)=-1}}}; {{{sin(theta)=1}}}
{{{sin(theta)=-1/2}}}; {{{sin(theta)=1}}}
{{{theta=matrix(1,3,7pi/6,",",11pi/6)}}}; {{{theta=pi/2}}}

Edwin</pre>