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Simplifying 10cos(2x + -1.5) = 7 Reorder the terms: 10cos(-1.5 + 2x) = 7 (-1.5 * 10cos + 2x * 10cos) = 7 (-15cos + 20cosx) = 7 Solving -15cos + 20cosx = 7 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Reorder the terms: -7 + -15cos + 20cosx = 7 + -7 Combine like terms: 7 + -7 = 0 -7 + -15cos + 20cosx = 0 The solution to this equation could not be determined.
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