This calculator will walk you through approximating the area using Trapezoidal Rule.Please enter a function, starting point, ending point, and how many divisions with which you want to use Trapezoidal Rule to evaluate.
Trigonometric functions are evaluated in Radian Mode. To convert from degrees to radians use: degrees * (pi / 180).
Also, if your bounds contain symbols (i.e. pi/2, sqrt(2), etc) . Plug in the numerical representation (i.e pi/2 = 1.57079632679)