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OpenStudy (anonymous):
solve sin (2x)-sin (x)=2 cos ^{2}(x)-cos (x)
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OpenStudy (dumbcow):
before i type out solution, are these correct: x = pi/4, 5pi/4
OpenStudy (anonymous):
yes also π/3 and 5π/3
OpenStudy (anonymous):
|dw:1334825102327:dw|
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