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• Identical expressions

• - four *sin(two *x + pi/ four) = zero
• minus 4 multiply by sinus of (2 multiply by x plus Pi divide by 4) equally 0
• minus four multiply by sinus of (two multiply by x plus Pi divide by four) equally zero
• -4sin(2x + pi/4) = 0
• -4sin2x + pi/4 = 0
• -4*sin(2*x + pi divide by 4) = 0

• Similar expressions

• -4*sin(2*x - pi/4) = 0
• 4*sin(2*x + pi/4) = 0