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• Identical expressions

• one - two *cos(x + one / two) = zero
• 1 minus 2 multiply by co sinus of e of (x plus 1 divide by 2) equally 0
• one minus two multiply by co sinus of e of (x plus one divide by two) equally zero
• 1 - 2cos(x + 1/2) = 0
• 1 - 2cosx + 1/2 = 0
• 1 - 2*cos(x + 1 divide by 2) = 0

• Similar expressions

• 1 + 2*cos(x + 1/2) = 0
• 1 - 2*cos(x - 1/2) = 0