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- 8-9 part (b) evaluate the integralsa. Explain why 0 ≤ x²arctan(x) ≤ (pi*x²)/4 for all 0 ≤ x ≤ 1. b. Use the properties of the integrals to show that the value of the integral lower bound is 0, higher bound is 1 and the integral is x² arctan(x) dx lies on the interval [0,pi/12]Using composite trapezoidal rule evaluate the integral ∫pi/2 0 x^2e^2dx , n=7