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• Identical expressions

• cos((x - pi)/ four)/ two = zero
• co sinus of e of ((x minus Pi ) divide by 4) divide by 2 equally 0
• co sinus of e of ((x minus Pi ) divide by four) divide by two equally zero
• cosx - pi/4/2 = 0
• cos((x - pi) divide by 4) divide by 2 = 0

• Similar expressions

• cos((x + pi)/4)/2 = 0