Calculate a numerical definite integral

Press these keys

Walkthrough

1. 1
   Open fnInt

   Press MATH → 9:fnInt(. In MathPrint fill lower bound, upper bound, integrand and variable.

2. 2
   Evaluate

   Press ENTER; the default numerical tolerance is suitable for standard course work.

3. 3
   Interpret sign

   An integral is signed accumulation; regions below the axis subtract.

Worked example