what is the formula of cot 2 x 1（関連順）

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Proof of the identity 1 + cot^2(theta) = cosec^2(theta) |Proved cot^2(x) + 1 = cosec^2(x)

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

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

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`cotx.cot2x-cot2x.cot3x- cot3x.cotx= 1`.

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逆三角関数：cot⁻¹ √ [(1+x^2) - x] を最も単純な形で書きます。

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cos(2x) = (cot^2x - 1) / 2cotx

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formula of cosec^2x- cot^2x=1

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結果 : what is the formula of cot 2 x 1