This applet allows for visualization of rectangular and trapezoidal approximations of areas under curves.[br][br]R is the value of the rectangular approximation[br]T is the value of the trapezoidal approximation[br]a is the left endpoint[br]b is the right endpoint[br]n is the number of rectangles[br]d is the position of the right of the rectangle (it can shift from a left endpoint to midpoint to right endpoint approximations)