Question 726806
{{{ 1.2sin(x)-9.1sin(2x)=0 }}}
{{{ 1.2sin(x)-9.1*2sin(x)cos(x)=0 }}}
{{{ sin(x)*(1.2 - 18.2cos(x))=0 }}}
sin(x) = 0
x = 0, pi
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1.2 - 18.2cos(x)=0
cos(x) = 1.2/18.2
x =~ 1.505
x =~ 4.778
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Those are the 4 answers between 0 and 2pi