Question 590098
<pre>
          sin(x)sec(x) = 2sin(x)
sin(x)sec(x) - 2sin(x) = 0
    sin(x)[sec(x) - 2] = 0

sin(x) = 0;    sec(x) - 2 = 0

     x = 0,<font face="symbol">p</font>       sec(x) = 2
                   cos(x) = {{{1/2}}}
                        x = {{{pi/3}}}, {{{5pi/3}}}

Edwin</pre>