February 19, 2017

Homework Help: trigonometry

Posted by lan on Thursday, May 12, 2011 at 7:45pm.

Find the sum of all of the solutions to the equation cos(2x) - sin2(x) - 1 = 0 in the interval 0 < x < 5 pi. (Use radian measure for x.) (A) 15pi (B) 0 (C) pi (D) 10pi (E) None of the above.

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