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• Identical expressions

• cos(x + one)/sin(x + one) = zero
• co sinus of e of (x plus 1) divide by sinus of (x plus 1) equally 0
• co sinus of e of (x plus one) divide by sinus of (x plus one) equally zero
• cosx + 1/sinx + 1 = 0
• cos(x + 1) divide by sin(x + 1) = 0

• Similar expressions

• cos(x - 1)/sin(x + 1) = 0
• cos(x + 1)/sin(x - 1) = 0