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OpenStudy (anonymous):
the value pi/12 is the solution for the equation 2 cos^2(4x) -1=0 ?
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jimthompson5910 (jim_thompson5910):
have you tried plugging it in for x? ie replacing x with pi/12
OpenStudy (anonymous):
wait so im wrong?
jimthompson5910 (jim_thompson5910):
|dw:1445988514874:dw|
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