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• Identical expressions

• - two *cos(two *x + three) = zero
• minus 2 multiply by co sinus of e of (2 multiply by x plus 3) equally 0
• minus two multiply by co sinus of e of (two multiply by x plus three) equally zero
• -2cos(2x + 3) = 0
• -2cos2x + 3 = 0

• Similar expressions

• -2*cos(2*x - 3) = 0
• 2*cos(2*x + 3) = 0