Prove that x 2 x- 2 x 3 x- 3 x x-1

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Sine Rule

Prove that x ...

Question

Prove that cot x cot 2x – cot 2x cot 3x – cot 3x cot x = 1

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

cot x cot 2x – cot 2x cot 3x – cot 3x cot x = 1

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

3 {cos}^{- 1} x = {cos}^{- 1} (4 x^{3} - 3 x) x \in [1 / 2, 1]

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