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Simplifying Cos(2x) * cos(x) + -1sin(2x) * sin(x) = 0 Remove parenthesis around (2x) osC * 2x * cos(x) + -1sin(2x) * sin(x) = 0 Reorder the terms for easier multiplication: 2osC * x * cos * x + -1sin(2x) * sin(x) = 0 Multiply osC * x 2osxC * cos * x + -1sin(2x) * sin(x) = 0 Multiply osxC * cos 2co2s2xC * x + -1sin(2x) * sin(x) = 0 Multiply co2s2xC * x 2co2s2x2C + -1sin(2x) * sin(x) = 0 Remove parenthesis around (2x) 2co2s2x2C + -1ins * 2x * sin(x) = 0 Reorder the terms for easier multiplication: 2co2s2x2C + -1 * 2ins * x * ins * x = 0 Multiply -1 * 2 2co2s2x2C + -2ins * x * ins * x = 0 Multiply ins * x 2co2s2x2C + -2insx * ins * x = 0 Multiply insx * ins 2co2s2x2C + -2i2n2s2x * x = 0 Multiply i2n2s2x * x 2co2s2x2C + -2i2n2s2x2 = 0 Solving 2co2s2x2C + -2i2n2s2x2 = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '2i2n2s2x2' to each side of the equation. 2co2s2x2C + -2i2n2s2x2 + 2i2n2s2x2 = 0 + 2i2n2s2x2 Combine like terms: -2i2n2s2x2 + 2i2n2s2x2 = 0 2co2s2x2C + 0 = 0 + 2i2n2s2x2 2co2s2x2C = 0 + 2i2n2s2x2 Remove the zero: 2co2s2x2C = 2i2n2s2x2 Divide each side by '2o2s2x2C'. c = i2n2o-2C-1 Simplifying c = i2n2o-2C-1
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