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Simplifying 0.25cos(4x) + 2.25cos(3x) * cos(2x) + -0.25cos(x) = 0 Remove parenthesis around (4x) 0.25cos * 4x + 2.25cos(3x) * cos(2x) + -0.25cos(x) = 0 Reorder the terms for easier multiplication: 0.25 * 4cos * x + 2.25cos(3x) * cos(2x) + -0.25cos(x) = 0 Multiply 0.25 * 4 1cos * x + 2.25cos(3x) * cos(2x) + -0.25cos(x) = 0 Multiply cos * x 1cosx + 2.25cos(3x) * cos(2x) + -0.25cos(x) = 0 Remove parenthesis around (3x) 1cosx + 2.25cos * 3x * cos(2x) + -0.25cos(x) = 0 Remove parenthesis around (2x) 1cosx + 2.25cos * 3x * cos * 2x + -0.25cos(x) = 0 Reorder the terms for easier multiplication: 1cosx + 2.25 * 3 * 2cos * x * cos * x + -0.25cos(x) = 0 Multiply 2.25 * 3 1cosx + 6.75 * 2cos * x * cos * x + -0.25cos(x) = 0 Multiply 6.75 * 2 1cosx + 13.5cos * x * cos * x + -0.25cos(x) = 0 Multiply cos * x 1cosx + 13.5cosx * cos * x + -0.25cos(x) = 0 Multiply cosx * cos 1cosx + 13.5c2o2s2x * x + -0.25cos(x) = 0 Multiply c2o2s2x * x 1cosx + 13.5c2o2s2x2 + -0.25cos(x) = 0 Multiply cos * x 1cosx + 13.5c2o2s2x2 + -0.25cosx = 0 Reorder the terms: 1cosx + -0.25cosx + 13.5c2o2s2x2 = 0 Combine like terms: 1cosx + -0.25cosx = 0.75cosx 0.75cosx + 13.5c2o2s2x2 = 0 Solving 0.75cosx + 13.5c2o2s2x2 = 0 Solving for variable 'c'. The solution to this equation could not be determined.
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