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Simplifying cos(4x) * cos(x) + sin(4x) * sin(x) = 0 Remove parenthesis around (4x) cos * 4x * cos(x) + sin(4x) * sin(x) = 0 Reorder the terms for easier multiplication: 4cos * x * cos * x + sin(4x) * sin(x) = 0 Multiply cos * x 4cosx * cos * x + sin(4x) * sin(x) = 0 Multiply cosx * cos 4c2o2s2x * x + sin(4x) * sin(x) = 0 Multiply c2o2s2x * x 4c2o2s2x2 + sin(4x) * sin(x) = 0 Remove parenthesis around (4x) 4c2o2s2x2 + ins * 4x * sin(x) = 0 Reorder the terms for easier multiplication: 4c2o2s2x2 + 4ins * x * ins * x = 0 Multiply ins * x 4c2o2s2x2 + 4insx * ins * x = 0 Multiply insx * ins 4c2o2s2x2 + 4i2n2s2x * x = 0 Multiply i2n2s2x * x 4c2o2s2x2 + 4i2n2s2x2 = 0 Solving 4c2o2s2x2 + 4i2n2s2x2 = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-4i2n2s2x2' to each side of the equation. 4c2o2s2x2 + 4i2n2s2x2 + -4i2n2s2x2 = 0 + -4i2n2s2x2 Combine like terms: 4i2n2s2x2 + -4i2n2s2x2 = 0 4c2o2s2x2 + 0 = 0 + -4i2n2s2x2 4c2o2s2x2 = 0 + -4i2n2s2x2 Remove the zero: 4c2o2s2x2 = -4i2n2s2x2 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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