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Simplifying (-6sinx)(8 + -7cosx) + -1(6cosx)(7sinx) = 0 Remove parenthesis around (-6insx) -6insx(8 + -7cosx) + -1(6cosx)(7sinx) = 0 (8 * -6insx + -7cosx * -6insx) + -1(6cosx)(7sinx) = 0 Reorder the terms: (42cinos2x2 + -48insx) + -1(6cosx)(7sinx) = 0 (42cinos2x2 + -48insx) + -1(6cosx)(7sinx) = 0 Remove parenthesis around (6cosx) 42cinos2x2 + -48insx + -1 * 6cosx(7sinx) = 0 Remove parenthesis around (7insx) 42cinos2x2 + -48insx + -1 * 6cosx * 7insx = 0 Reorder the terms for easier multiplication: 42cinos2x2 + -48insx + -1 * 6 * 7cosx * insx = 0 Multiply -1 * 6 42cinos2x2 + -48insx + -6 * 7cosx * insx = 0 Multiply -6 * 7 42cinos2x2 + -48insx + -42cosx * insx = 0 Multiply cosx * insx 42cinos2x2 + -48insx + -42cinos2x2 = 0 Reorder the terms: 42cinos2x2 + -42cinos2x2 + -48insx = 0 Combine like terms: 42cinos2x2 + -42cinos2x2 = 0 0 + -48insx = 0 -48insx = 0 Solving -48insx = 0 Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Divide each side by '-48'. insx = 0 Simplifying insx = 0 The solution to this equation could not be determined.
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