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• Identical expressions

• -cot(x)^ two - one = zero
• minus cotangent of (x) squared minus 1 equally 0
• minus cotangent of (x) to the power of two minus one equally zero
• -cot(x)2 - 1 = 0
• -cotx2 - 1 = 0
• -cot(x)² - 1 = 0
• -cot(x) to the power of 2 - 1 = 0
• -cotx^2 - 1 = 0

• Similar expressions

• -cot(x)^2 + 1 = 0
• cot(x)^2 - 1 = 0