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OpenStudy (laddiusmaximus):
1-2sin^2(27)
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OpenStudy (amistre64):
cos(2x) = 1-2sin^2(x) cos(2*27) = 1 - 2sin^2(27) cos(54)
OpenStudy (laddiusmaximus):
wow that was really simple. i panic when I see these things.
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