Selecting an Integration Method

Selecting an Integration Method

IB Year 6 | Grade 12

Find \(\displaystyle\int \dfrac{1}{\cos^3(3x)}\,\mathrm{d}x\).

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Answer:\(\dfrac{\sec(3x)\tan(3x)}{6}+\dfrac{\ln|\sec(3x)+\tan(3x)|}{6}+C\)

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