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OpenStudy (anonymous):
1 + cos(12x) = _____. A. 2sin2(6x) B. 2sin2(12x) C. 2cos2(12x) D. 2cos2(6x)
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OpenStudy (anonymous):
I believe it is 1.814180971. I literally just typed this equation in my graphing calculator and it came up with this.
OpenStudy (mathstudent55):
Use this identity: \( \cos 2\theta = 2\cos^2 \theta - 1 \)
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