Question 929303
Substitute {{{u=sin(theta)}}}
{{{6u^2+5u=6}}}
{{{6u^2+5u-6=0}}}
{{{(2u+3)(3u-2)=0}}}
Two "u" solutions:
{{{2u+3=0}}}
{{{2u=-3}}}
{{{u=-3/2}}}
{{{sin(theta)=-3/2}}}
No solution since {{{abs(sin(theta))<=1}}}
{{{3u-2=0}}}
{{{3u=2}}}
{{{u=2/3}}}
{{{sin(theta)=2/3}}}
{{{theta=41.8}}} and {{{theta=138.2}}}