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\( \frac{d}{dx} ( log\: tan\: x)\) is equal to \[ \begin{array} ((A)\: 2\: sec\: 2x \quad & (B)\: 2\: cosec\: 2 x \\ (C)\: sec \: 2 x \quad & (D)\: cosec \: 2x \end{array} \]

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