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• Identical expressions

• two *sin(x + one / two) = zero
• 2 multiply by sinus of (x plus 1 divide by 2) equally 0
• two multiply by sinus of (x plus one divide by two) equally zero
• 2sin(x + 1/2) = 0
• 2sinx + 1/2 = 0
• 2*sin(x + 1 divide by 2) = 0

• Similar expressions

• 2*sin(x - 1/2) = 0