Arc Length Option

Press to access the arc length option which finds the length of a curve between two values.

Next, enter an expression, the variable, a start value, and an end value separated by commas. For example, to find the length of the curve y = x2 between x = 2 and x = 3 inclusive, enter

2 2 3

Note: The error is described as tolerance, tol. The value of tol is used to determine how accurate to calculate this integral. The TI tries to keep the absolute error under tol. A smaller value yields a more accurate integral but takes longer to compute. It can be changed in the tolerance editor available by pressing . Its value is typically about 0.001.