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• Identical expressions

• -sin((x + pi)/ four)/ eight = zero
• minus sinus of ((x plus Pi ) divide by 4) divide by 8 equally 0
• minus sinus of ((x plus Pi ) divide by four) divide by eight equally zero
• -sinx + pi/4/8 = 0
• -sin((x + pi) divide by 4) divide by 8 = 0

• Similar expressions

• sin((x + pi)/4)/8 = 0
• -sin((x - pi)/4)/8 = 0