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Simplifying 0 = cos4(5x) Remove parenthesis around (5x) 0 = cos4 * 5x Reorder the terms for easier multiplication: 0 = 5cos4 * x Multiply cos4 * x 0 = 5cos4x Solving 0 = 5cos4x Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-5cos4x' to each side of the equation. 0 + -5cos4x = 5cos4x + -5cos4x Remove the zero: -5cos4x = 5cos4x + -5cos4x Combine like terms: 5cos4x + -5cos4x = 0 -5cos4x = 0 Divide each side by '-5'. cos4x = 0 Simplifying cos4x = 0 The solution to this equation could not be determined.
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