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OpenStudy (anonymous):
Mark any solutions to the equation 2cos2x - 1 = 0.
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hero (hero):
Did you mean \(2 \cos(2x) - 1 = 0\) or \(2 \cos^2(x) - 1 = 0\)
OpenStudy (anonymous):
2cos^2(x)-1=0
OpenStudy (marissalovescats):
Well you solve the equation for cos (x) :|dw:1402018330549:dw|
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