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MATHEMATICS · Subjective · CBSE · Mathematics · Continuity and Differentiability · Continuity and Differentiability

Problem

Calculate f′ ⁣(π4)f'\!\left(\frac{\pi}{4}\right) for f(x)=tan⁡(3x)−cot⁡xf(x)=\tan(3x)-\cot x.

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