Question 831622
{{{14*sin^2(x) = 7}}}
{{{sin^2(x) = 7/14=1/2}}}
{{{sin(x)=sqrt(2)/2}}} and {{{sin(x)=-sqrt(2)/2}}}
{{{x=pi/4}}}, {{{x=(3*pi)/4}}}, {{{x=(5*pi)/4}}},{{{x=7*pi/4}}}