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Simplifying 0 = 40cos(8x7) Remove parenthesis around (8x7) 0 = 40cos * 8x7 Reorder the terms for easier multiplication: 0 = 40 * 8cos * x7 Multiply 40 * 8 0 = 320cos * x7 Multiply cos * x7 0 = 320cosx7 Solving 0 = 320cosx7 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-320cosx7' to each side of the equation. 0 + -320cosx7 = 320cosx7 + -320cosx7 Remove the zero: -320cosx7 = 320cosx7 + -320cosx7 Combine like terms: 320cosx7 + -320cosx7 = 0 -320cosx7 = 0 Divide each side by '-320'. cosx7 = 0 Simplifying cosx7 = 0 The solution to this equation could not be determined.
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