Question 1047009
<pre>
{{{sin(2x){{{""=""}}}{{{cos(x)}}}

{{{2sin(x)cos(x)}}}{{{""=""}}}{{{cos(x)}}}

{{{2sin(x)cos(x)-cos(x)}}}{{{""=""}}}{{{0}}} 

{{{cos(x)(2sin(x)^""-1)}}}{{{""=""}}}{{{0}}}

{{{cos(x)}}}{{{""=""}}}{{{0}}},  {{{2sin(x)^""-1}}}{{{""=""}}}{{{0}}}

For the first equation:

{{{x}}}{{{""=""}}}{{{matrix(1,3,pi/2,",",3pi/2)}}}

For the second equation:   

{{{2sin(x)-1}}}{{{""=""}}}{{{0}}}

{{{2sin(x)}}}{{{""=""}}}{{{1}}}

{{{sin(x)}}}{{{""=""}}}{{{1/2}}}

{{{x}}}{{{""=""}}}{{{matrix(1,3,pi/6,",",5pi/6)}}}

Four solutions.

Edwin</pre>