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Simplifying 0.8 = cos(2t) Remove parenthesis around (2t) 0.8 = cos * 2t Reorder the terms for easier multiplication: 0.8 = 2cos * t Multiply cos * t 0.8 = 2cost Solving 0.8 = 2cost Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-2cost' to each side of the equation. 0.8 + -2cost = 2cost + -2cost Combine like terms: 2cost + -2cost = 0 0.8 + -2cost = 0 Add '-0.8' to each side of the equation. 0.8 + -0.8 + -2cost = 0 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + -2cost = 0 + -0.8 -2cost = 0 + -0.8 Combine like terms: 0 + -0.8 = -0.8 -2cost = -0.8 Divide each side by '-2ost'. c = 0.4o-1s-1t-1 Simplifying c = 0.4o-1s-1t-1
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