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Prove That cot⁡2x=cos⁡2x1−cos⁡2x\cot^{2} x=\frac{\cos^{2} x}{1-\cos^{2} x}

Question 24

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Prove that cot⁡2x=cos⁡2x1−cos⁡2x\cot^{2} x=\frac{\cos^{2} x}{1-\cos^{2} x} .

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