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OpenStudy (anonymous):
how do i solve for x in the equation: 2 cos x + sin 2x = 0 ?
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OpenStudy (anonymous):
wtf
OpenStudy (anonymous):
sin2x=2sinxcosx 2cosx+2sinxcosx=0 2cosx(1+sinx)=0 sinx=-1 cosx=0
OpenStudy (anonymous):
how does 2sinxcosx=1+sinx
OpenStudy (anonymous):
2sinxcosx=sin(2x)
OpenStudy (anonymous):
so rewrite your equation to this: 2cosx+2sinxcosx=0 Now you factor out 2cosx from each term and are left with: 2cosx(1+sinx)=0
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OpenStudy (anonymous):
oh oh oh gotcha sorry
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