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Simplifying Cos(6x) + -1cos(3x) = 0 Remove parenthesis around (6x) osC * 6x + -1cos(3x) = 0 Reorder the terms for easier multiplication: 6osC * x + -1cos(3x) = 0 Multiply osC * x 6osxC + -1cos(3x) = 0 Remove parenthesis around (3x) 6osxC + -1cos * 3x = 0 Reorder the terms for easier multiplication: 6osxC + -1 * 3cos * x = 0 Multiply -1 * 3 6osxC + -3cos * x = 0 Multiply cos * x 6osxC + -3cosx = 0 Reorder the terms: -3cosx + 6osxC = 0 Solving -3cosx + 6osxC = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-6osxC' to each side of the equation. -3cosx + 6osxC + -6osxC = 0 + -6osxC Combine like terms: 6osxC + -6osxC = 0 -3cosx + 0 = 0 + -6osxC -3cosx = 0 + -6osxC Remove the zero: -3cosx = -6osxC Divide each side by '-3osx'. c = 2C Simplifying c = 2C
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