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OpenStudy (anonymous):
solve the trig equation: 2sin^2x=2+cosx
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OpenStudy (dumbcow):
sin^2 = 1 - cos^2 --> 2 - 2cos^2 = 2 + cos --> 2cos^2 + cos = 0 ...
OpenStudy (anonymous):
can you explain why it is 2-2cos^2
OpenStudy (anonymous):
@dumbcow
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