" 2."cot x cot2x-cat2x cot3x-cot3x cot x=1

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cot x cot 2x-cot 2x cot3x-cot3x cotx=1

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Prove that: cot xcot 2x-cot2x cot3x-cot3x cot x=1

Prove that cotx cot2x - cot2x cot3x - cot3x cotx = 1

Prove the following: cot x cot 2x -cot 2x cot 3x -cot 3x cot x = 1

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cotx cot 2x - cot 2x cot 3x - cot 3x cot x = 1

cot x cot 2x - cot 2x cot 3x - cot 3x cot x=1