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OpenStudy (anonymous):
find the solution set of the equation 2cos^2 x = 1/2 in the interval of 0< x<2 pi. A) pi/6 and 5pi/6 B) pi/6, 5pi/6, 7pi/6, 11pi/6 C) pi/3, 2pi/3, 4pi/3, 5pi/3 D) pi/3 and 5pi/3
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OpenStudy (eyust707):
well first lets simplify
OpenStudy (eyust707):
|dw:1344840843961:dw|
OpenStudy (eyust707):
Divide both sides by 2|dw:1344840882684:dw|
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