A Level

MATHEMATICS · Single correct · A Level · Mathematics · Integration · Integration

Problem

5. Evaluate ∫arctan⁡xdx\int \arctan x d x. (A) 1∣x∣x2−1+C\frac{1}{|x| \sqrt{x^{2}-1}}+C (B) sec⁡2x+C\sec ^{2} x+C (C) xarctan⁡x+12ln⁡(1+x2)+Cx \arctan x+\frac{1}{2} \ln \left(1+x^{2}\right)+C (D) xarctan⁡x−12ln⁡(1+x2)+Cx \arctan x-\frac{1}{2} \ln \left(1+x^{2}\right)+C

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