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2006 AIME A Problems/Problem 12

Revision as of 15:45, 25 September 2007 by 1=2 (talk | contribs) (→‎Problem)

Problem

Find the sum of the values of $x$ such that $\cos^3 3x+ \cos^3 5x = 8 \cos^3 4x \cos^3 x,$ where $x$ is measured in degrees and $100< x< 200.$

Solution

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See also

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