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Simplifying 7cos(3x) + -6sin(3x) = 4 Remove parenthesis around (3x) 7cos * 3x + -6sin(3x) = 4 Reorder the terms for easier multiplication: 7 * 3cos * x + -6sin(3x) = 4 Multiply 7 * 3 21cos * x + -6sin(3x) = 4 Multiply cos * x 21cosx + -6sin(3x) = 4 Remove parenthesis around (3x) 21cosx + -6ins * 3x = 4 Reorder the terms for easier multiplication: 21cosx + -6 * 3ins * x = 4 Multiply -6 * 3 21cosx + -18ins * x = 4 Multiply ins * x 21cosx + -18insx = 4 Solving 21cosx + -18insx = 4 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '18insx' to each side of the equation. 21cosx + -18insx + 18insx = 4 + 18insx Combine like terms: -18insx + 18insx = 0 21cosx + 0 = 4 + 18insx 21cosx = 4 + 18insx Divide each side by '21osx'. c = 0.1904761905o-1s-1x-1 + 0.8571428571ino-1 Simplifying c = 0.1904761905o-1s-1x-1 + 0.8571428571ino-1 Reorder the terms: c = 0.8571428571ino-1 + 0.1904761905o-1s-1x-1
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