Mathematics - Numerical Methods - Numerical integration - Trapezoid vs Simpson Comparison

Show a curve (e.g., f(x)=sin(x) from 0 to π). The student toggles between approximation methods: Left rectangles, Right rectangles, Trapezoids, Simpson's parabolas. A slider controls n (number of subdivisions: 2, 4, 8, 16, 32). Display the approximation value and the error vs exact answer (which is