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Simplifying 7cos2(x) + 7cos2(x) + -7 = 0 Multiply cos2 * x 7cos2x + 7cos2(x) + -7 = 0 Multiply cos2 * x 7cos2x + 7cos2x + -7 = 0 Reorder the terms: -7 + 7cos2x + 7cos2x = 0 Combine like terms: 7cos2x + 7cos2x = 14cos2x -7 + 14cos2x = 0 Solving -7 + 14cos2x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 14cos2x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + 14cos2x = 0 + 7 14cos2x = 0 + 7 Combine like terms: 0 + 7 = 7 14cos2x = 7 Divide each side by '14os2x'. c = 0.5o-1s-2x-1 Simplifying c = 0.5o-1s-2x-1
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