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### Evaluate a Definite Integral with the TI-84 Plus

You can use the option on the Calculate menu of the TI84 graphing calculator to find the value of a definite integral of a function. If *f*(*x*) is positive for [more…]

### Find the Slope of a Curve with the TI-84 Plus

The TI84 graphing calculator is not equipped to find the derivative of a function. For example, it cannot tell you that the derivative of *x*^{2} is 2*x*. But the calculator is equipped with a numerical routine [more…]

### TI-84 Plus Calculator's Math NUM Submenu

The Math NUM submenu houses several functions, including the absolute value function, the greatest-integer function, and the **min** and **max** functions. To access the Math NUM submenu, press the [more…]

### Convert Degrees to Radians with the TI-84 Plus Calculator

The functions housed in the TI-84-Plus calculator's Angle menu allow you to convert between degrees and radians or from radians to degrees. To convert degrees to radians, follow these steps: [more…]

### Convert between Degrees and DMS with the TI-84 Plus Calculator

The functions housed in the TI-84 Plus calculator's Angle menu allow you to convert between degrees and DMS (degrees, minutes, and seconds) and between DMS and degrees. You can also override the angle [more…]

### TI-84 Plus Keyboard Basics

The row of keys under the calculator screen on the TI-84 Plus keyboard contains the keys you use when graphing. The next three rows, for the most part, contain editing keys, menu keys, and arrow keys. [more…]

### Edit Entries on the TI-84 Plus Calculator

The TI-84 Plus graphing calculator offers four ways to edit an entry: deleting the entire entry, erasing part of the entry, inserting characters, and keying over existing characters. [more…]

### TI-84 Plus Graphing Calculator Menus

Most TI-84 Plus graphing functions and commands you use are found in the menus housed in the calculator. To get the most out of your calculator, you need to know how to find and select menu items. [more…]

### Evaluate Arithmetic Expressions with the TI-84 Plus Calculator

Arithmetic expressions are evaluated on the TI-84 Plus calculator's Home screen. The Home screen is the screen you see when you turn the calculator on. If the Home screen is not already displayed on the [more…]

### TI-84 Plus Calculator Keys to Access Functions

Starting with the fifth row of the TI-84 Plus calculator, you find the functions commonly used on a scientific calculator. Here’s what they are and how you use them: [more…]

### Order of Operations and the TI-84 Plus Calculator

The order in which the TI-84 Plus calculator performs operations is the standard order that you are all used to. Spelled out in detail, here is the order in which the calculator performs operations: [more…]

### TI-84 Plus Calculator's Math MATH Submenu

Press **[MATH]** to access the Math MATH submenu on the TI-84 Plus calculator. This submenu contains general mathematical functions you can insert into an expression. [more…]

### How to Enter Functions on the TI-84 Plus

Before you can graph a function, you must enter it into the TI-84 Plus graphing calculator. The calculator can handle up to ten functions at once, **Y**** _{1}** through [more…]

### TI-84 Plus Calculator's Equation Solver

The TI-84 Plus graphing calculator Equation Solver solves an equation for one variable given the values of the other variables in the equation. The Solver is capable of dealing only with real numbers and [more…]

### Define Solution Bounds in TI-84's Equation Solver

The **bound** variable at the bottom of the Equation Solver screen is where you enter the bounds of the interval containing the solution you’re seeking with the TI-84 Plus graphing calculator. The default [more…]

### Cabri Jr. versus GeoMaster on the TI-84 Plus Calculator

Because the TI-84 Plus comes equipped with two geometry applications, Cabri Jr. and GeoMaster, you can now do your geometric investigations on the calculator. Granted, the calculator screen is rather small [more…]

### Quit GeoMaster on the TI-84 Plus Calculator

You can use either a clean way or a dirty way of quitting the GeoMaster application on the TI-84 Plus calculator. The clean way truly terminates GeoMaster, [more…]

### Construct Points for Geometric Figures with the TI-84 Plus

You can tell the TI-84 Plus calculator where you want to construct a freestanding point in two ways: Use the arrow keys to identify the location of the point, or tell the calculator the coordinates of [more…]

### How to Construct Perpendicular Bisectors with GeoMaster

In GeoMaster on the TI-84 Plus graphing calculator, a perpendicular bisector can be constructed to an already existing line, segment, ray, vector, or side of a polygon or triangle. To construct a perpendicular [more…]

### How to Construct Angle Bisectors with GeoMaster

For GeoMaster on the TI-84 graphing calculator to recognize the existence of an angle, that angle must contain three defining points — the vertex and a point on each side of the angle. Also, GeoMaster [more…]

### Construct Points of Intersection with GeoMaster on the TI-84 Plus

GeoMaster on the TI-84 Plus graphing calculator can construct the points of intersection of any pair of the following types of objects: lines, segments, rays, vectors, sides of polygons, circles, and arcs [more…]

### How to Construct a Point on an Object with the TI-84 Plus

You can use the GeoMaster **DRAW** menu on the TI-84 Plus to construct a point so that it is part of an existing object.

Then use the arrow keys to move the cursor to the location on the object where you wish [more…]

### How to Construct a Midpoint with the TI-84 Plus

With GeoMaster on the TI-84 Plus graphing calculator, you can construct the midpoint of an already constructed segment or the midpoint between two existing points. The segment can be the side of a triangle [more…]

### How to Determine If Two Lines Are Parallel or Perpendicular

It is often the case that when you construct lines, two lines may look parallel or perpendicular, when in fact they aren’t. GeoMaster on the TI-84 Plus graphing calculator can determine whether lines are [more…]

### How to Determine If Three Points Are Collinear on the TI-84 Plus

Three points are collinear if they are on the same line. GeoMaster on the TI-84 Plus graphing calculator can determine whether lines are parallel or perpendicular for you. It is sometimes difficult to [more…]