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OpenStudy (anonymous):
HELP!! PLEASE!! WILL MEDAL & FAN!!! Solve on the interval [0,2pi): 2cos^2x+3cosx+1=0 A. x=pi/6, x=7pi/6 B. x=pi, x=2pi/3, x=4pi/3 C. x=2pi, x=pi/3 D. x=2pi, x=pi/4, x=5pi/4
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OpenStudy (anonymous):
@jim_thompson5910 @satellite73
OpenStudy (anonymous):
I think it could be B.
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