Question 617453
With multiple choice you could try them out and see. Or you could figure out which one has the different reference angle. Or you go through the process of solving the equation:
{{{4sin^2(x) = 1}}}
{{{sin^2(x) = 1/4}}}
{{{sqrt(sin^2(x)) = sqrt(1/4)}}}
{{{sin(x) = 1/2}}} or {{{sin(x) = -1/2}}}
etc.