Evaluate: ∫ 1/(1 + x²) dx
Evaluate: ∫ 1/(1 + x²) dx
- A. sin⁻¹ x + C
- B. log|1 + x²| + C
- C. tan⁻¹ x + C
- D. sec⁻¹ x + C
Answer: C) tan⁻¹ x + C
Explanation: The derivative of tan⁻¹ x is 1/(1 + x²), hence its integral is tan⁻¹ x + C.
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