Integrals

⭐ Important Questions

1. Evaluate ∫dxx² + 4.
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   ∫dxx² + 4 = 12tan^{-1}(x2) + C
2. Evaluate ∫_0^π/2 sin x dx.
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   ∫_0^π/2 sin x dx = [-cos x]_0^π/2 = 0 - (-1) = 1