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Simplifying cos(4x) * cos(x) = -1sin(4x) * sin(x) Remove parenthesis around (4x) cos * 4x * cos(x) = -1sin(4x) * sin(x) Reorder the terms for easier multiplication: 4cos * x * cos * x = -1sin(4x) * sin(x) Multiply cos * x 4cosx * cos * x = -1sin(4x) * sin(x) Multiply cosx * cos 4c2o2s2x * x = -1sin(4x) * sin(x) Multiply c2o2s2x * x 4c2o2s2x2 = -1sin(4x) * sin(x) Remove parenthesis around (4x) 4c2o2s2x2 = -1ins * 4x * sin(x) Reorder the terms for easier multiplication: 4c2o2s2x2 = -1 * 4ins * x * ins * x Multiply -1 * 4 4c2o2s2x2 = -4ins * x * ins * x Multiply ins * x 4c2o2s2x2 = -4insx * ins * x Multiply insx * ins 4c2o2s2x2 = -4i2n2s2x * x Multiply i2n2s2x * x 4c2o2s2x2 = -4i2n2s2x2 Solving 4c2o2s2x2 = -4i2n2s2x2 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '4o2s2x2'. c2 = -1i2n2o-2 Simplifying c2 = -1i2n2o-2 Combine like terms: -1i2n2o-2 + i2n2o-2 = 0 c2 + i2n2o-2 = 0 The solution to this equation could not be determined.
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