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Simplifying sin(3x + 40) * sin(3x + 10) = 0.4 Reorder the terms: ins(40 + 3x) * sin(3x + 10) = 0.4 Reorder the terms: ins(40 + 3x) * ins(10 + 3x) = 0.4 Reorder the terms for easier multiplication: ins * ins(40 + 3x)(10 + 3x) = 0.4 Multiply ins * ins i2n2s2(40 + 3x)(10 + 3x) = 0.4 Multiply (40 + 3x) * (10 + 3x) i2n2s2(40(10 + 3x) + 3x * (10 + 3x)) = 0.4 i2n2s2((10 * 40 + 3x * 40) + 3x * (10 + 3x)) = 0.4 i2n2s2((400 + 120x) + 3x * (10 + 3x)) = 0.4 i2n2s2(400 + 120x + (10 * 3x + 3x * 3x)) = 0.4 i2n2s2(400 + 120x + (30x + 9x2)) = 0.4 Combine like terms: 120x + 30x = 150x i2n2s2(400 + 150x + 9x2) = 0.4 (400 * i2n2s2 + 150x * i2n2s2 + 9x2 * i2n2s2) = 0.4 (400i2n2s2 + 150i2n2s2x + 9i2n2s2x2) = 0.4 Solving 400i2n2s2 + 150i2n2s2x + 9i2n2s2x2 = 0.4 Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Reorder the terms: -0.4 + 400i2n2s2 + 150i2n2s2x + 9i2n2s2x2 = 0.4 + -0.4 Combine like terms: 0.4 + -0.4 = 0.0 -0.4 + 400i2n2s2 + 150i2n2s2x + 9i2n2s2x2 = 0.0 The solution to this equation could not be determined.
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