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Simplifying cos2(5x) + -1sin2(5x) = 0 Remove parenthesis around (5x) cos2 * 5x + -1sin2(5x) = 0 Reorder the terms for easier multiplication: 5cos2 * x + -1sin2(5x) = 0 Multiply cos2 * x 5cos2x + -1sin2(5x) = 0 Remove parenthesis around (5x) 5cos2x + -1in2s * 5x = 0 Reorder the terms for easier multiplication: 5cos2x + -1 * 5in2s * x = 0 Multiply -1 * 5 5cos2x + -5in2s * x = 0 Multiply in2s * x 5cos2x + -5in2sx = 0 Solving 5cos2x + -5in2sx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '5in2sx' to each side of the equation. 5cos2x + -5in2sx + 5in2sx = 0 + 5in2sx Combine like terms: -5in2sx + 5in2sx = 0 5cos2x + 0 = 0 + 5in2sx 5cos2x = 0 + 5in2sx Remove the zero: 5cos2x = 5in2sx Divide each side by '5os2x'. c = in2o-1s-1 Simplifying c = in2o-1s-1
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