Question 310461
{{{2sin^2(2x)=1}}}
{{{sin^2(2x)=1/2}}}
{{{sin(2x)=0 +- 1/sqrt(2)}}}
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{{{sin(2x)=sqrt(2)/2}}}
{{{2x=45}}} or {{{2x=135}}}
{{{x=22.5}}} or {{{x=67.5}}}
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{{{sin(2x)=-sqrt(2)/2}}}
{{{2x=225}}} or {{{2x=315}}}
{{{x=112.5}}} or {{{x=157.5}}}
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(22.5,67.5,112.5,157.5)