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Simplifying 2cos * 2x + 3cosx + 1 = 0 Reorder the terms for easier multiplication: 2 * 2cos * x + 3cosx + 1 = 0 Multiply 2 * 2 4cos * x + 3cosx + 1 = 0 Multiply cos * x 4cosx + 3cosx + 1 = 0 Reorder the terms: 1 + 4cosx + 3cosx = 0 Combine like terms: 4cosx + 3cosx = 7cosx 1 + 7cosx = 0 Solving 1 + 7cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 7cosx = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 7cosx = 0 + -1 7cosx = 0 + -1 Combine like terms: 0 + -1 = -1 7cosx = -1 Divide each side by '7osx'. c = -0.1428571429o-1s-1x-1 Simplifying c = -0.1428571429o-1s-1x-1
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