Texas Instruments TI-89 Titanium User Manual page 320

Overview of the Math Menu
Press ‡ from the Graph screen.
Math Tool Description
Value Evaluates a selected y(x) function at a specified x value.
Zero, Finds a zero (x-intercept), minimum, or maximum point
Minimum, within an interval.
Maximum
Intersection Finds the intersection of two functions.
Derivatives Finds the derivative (slope) at a point.
Finds the approximate numerical integral over an interval.
f(x)dx
‰
Inflection Finds the inflection point of a curve, where its second
derivative changes sign (where the curve changes
concavity).
Distance Draws and measures a line between two points on the
same function or on two different functions.
Tangent Draws a tangent line at a point and displays its equation.
Arc Finds the arc length between two points along a curve.
Basic Function Graphing
On the Derivatives submenu, only
dy/dx is available for function
graphing. The other derivatives
are available for other graphing
modes (parametric, polar, etc.).
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