Question 550177
sin2&#952; = cos&#952; ; 90&#8804; &#952; <180
&#952 = 90 degrees is a solution
{{{ cos(90) = 0 }}}
{{{ sin(180) = 0 }}}
also,
&#952 = 150 is a solution
{{{ cos(150) = - sqrt(3) / 2 }}}
{{{ sin(300) = - sqrt(3) / 2 }}}
i don't think there are other solutions