How To Graph Polar Equations On Ti84 Plus?
Have you ever wanted to graph a polar equation on your TI84 Plus? Maybe you’re a student who’s just been introduced to polar coordinates, or maybe you’re an engineer who needs to graph a polar equation for work. Whatever the reason, I’m here to help. In this article, I’ll show you how to graph polar equations on your TI84 Plus in just a few simple steps. We’ll start by reviewing the basics of polar coordinates, and then we’ll move on to graphing some specific equations. By the end of this article, you’ll be a pro at graphing polar equations on your TI84 Plus!
Step  Instructions  Example 

1  Enter the equation in polar form.  y = 2sin(x) 
2  Press MODE and select Polar.  
3  Press GRAPH to view the graph. 
Entering Polar Equations
To enter a polar equation on the TI84 Plus, follow these steps:
1. Press the MODE button and select Polar.
2. Enter the equation in the Y= screen.
3. Press the GRAPH button to graph the equation.
Here are some additional tips for entering polar equations:
 To specify the orientation of the graph, use the < and **> keys to change the Mode** setting.
 To specify the range of the graph, use the [ and ] keys to change the Xmin, Xmax, Ymin, and Ymax values.
Viewing Polar Equations
To view a polar equation on the TI84 Plus, you can use the following tools:
 Viewing window: The viewing window determines the area of the graph that is visible on the screen. You can change the viewing window by pressing the WINDOW button and using the Xmin, Xmax, Ymin, and Ymax sliders.
 Zoom: You can zoom in and out on the graph by pressing the ZOOM button and selecting the desired zoom option.
 Pan: You can pan the graph by pressing the TRACE button and using the < and **>** keys.
The TI84 Plus is a powerful graphing calculator that can be used to graph polar equations. By following the steps in this tutorial, you can learn how to enter, view, and manipulate polar equations on the TI84 Plus.
3. Transforming Polar Equations
In addition to graphing polar equations, you can also transform them. This can be useful for simplifying equations, or for finding new equations that represent the same curve.
There are three main types of transformations that you can apply to polar equations:
 Translations: These move the graph of the equation up, down, left, or right.
 Rotations: These rotate the graph of the equation around the origin.
 Dilation: These stretch or shrink the graph of the equation.
We will now look at each of these transformations in more detail.
Translations
To translate a polar equation, you simply add a constant to the *r*coordinate of each point on the graph. For example, if you have the equation `r = 2`, and you want to translate it up by 5 units, you would add 5 to the *r*coordinate of each point on the graph. This would give you the equation `r = 2 + 5`.
The following table shows the effect of translating a polar equation by different amounts:
 Translation  Equation  Graph 
———
 Up 5 units  `r = 2 + 5`  ![Graph of r = 2 + 5](https://i.imgur.com/53115tI.png) 
 Down 5 units  `r = 2 – 5`  ![Graph of r = 2 – 5](https://i.imgur.com/182424o.png) 
 Left 5 units  `r = 2 + 5`  ![Graph of r = 2 + 5](https://i.imgur.com/6530043.png) 
 Right 5 units  `r = 2 – 5`  ![Graph of r = 2 – 5](https://i.imgur.com/7062436.png) 
Rotations
To rotate a polar equation, you simply multiply the coordinate of each point on the graph by a constant. For example, if you have the equation `r = 2`, and you want to rotate it counterclockwise by 90 degrees, you would multiply the coordinate of each point on the graph by /2. This would give you the equation `r = 2(/2) = `.
The following table shows the effect of rotating a polar equation by different amounts:
 Rotation  Equation  Graph 
———
 Rotate counterclockwise by 90 degrees  `r = `  ![Graph of r = ](https://i.imgur.com/8103819.png) 
 Rotate counterclockwise by 180 degrees  `r = `  ![Graph of r = ](https://i.imgur.com/1787397.png) 
 Rotate counterclockwise by 270 degrees  `r = `  ![Graph of r = ](https://i.imgur.com/1303353.png) 
 Rotate clockwise by 90 degrees  `r = /2`  ![Graph of r = /2](https://i.imgur.com/8348647.png) 
 Rotate clockwise by 180 degrees  `r = `  ![Graph of r = ](https://i.imgur.com/1343178.png) 
 Rotate clockwise by 270 degrees  `r = /2`  ![Graph of r = /2](https://i.imgur.com/3195052.png) 
Dilation
To dilate a polar equation, you simply multiply the *r*coordinate of each point on the graph by a constant. For example, if you have the equation `r = 2`, and you want to dilate it by a factor of 3, you would multiply the *r*coordinate of each point on the graph by 3. This would give you the equation `r = 6`.
The following table shows the effect of dilating a polar equation by different amounts:
 Dilation  Equation  Graph 
———
 Dilate by a factor of 2  `r =
How do I graph polar equations on a TI84 Plus?
1. Press MODE and select POLAR.
2. Enter the equation in polar form, using R for the radius and for the angle.
3. Press GRAPH to view the graph.
What are the different types of polar equations?
There are three main types of polar equations:
 Constant radius equations: These equations have the form r = a, where a is a constant. The graph of a constant radius equation is a circle with radius a.
 Linear equations: These equations have the form r = a + b, where a and b are constants. The graph of a linear equation is a straight line.
 Conic sections: These equations have the form r = a, where a is a constant. The graph of a conic section is an ellipse, a parabola, or a hyperbola.
How do I find the intercepts of a polar equation?
To find the intercepts of a polar equation, set equal to 0 and /2. The xintercept is the value of r when is 0, and the yintercept is the value of r when is /2.
How do I find the asymptotes of a polar equation?
To find the asymptotes of a polar equation, set r equal to 0. The asymptotes are the lines that the graph of the equation approaches as r approaches 0.
How do I graph polar equations with multiple solutions?
To graph a polar equation with multiple solutions, you can use the TABLE function to create a table of values for r and . Then, you can plot the points on the graph.
How do I graph polar equations with symmetry?
Polar equations can have three types of symmetry:
 Reflectional symmetry: The graph of a polar equation is symmetric with respect to the pole if it is unchanged when is replaced by –.
 Rotational symmetry: The graph of a polar equation is symmetric with respect to the origin if it is unchanged when is replaced by + 2.
 Translational symmetry: The graph of a polar equation is symmetric with respect to a line if it is unchanged when r is replaced by r + k, where k is a constant.
How do I use the polar mode on the TI84 Plus to solve problems?
The polar mode on the TI84 Plus can be used to solve a variety of problems, including:
 Finding the area of a polar region
 Finding the volume of a solid of revolution
 Solving trigonometric equations
 Finding the roots of a polynomial equation
For more information on how to use the polar mode on the TI84 Plus, please refer to the user manual.
In this blog post, we have discussed how to graph polar equations on the TI84 Plus. We first reviewed the basics of polar coordinates and how to convert between rectangular and polar coordinates. Then, we showed how to graph polar equations using the TI84 Plus’s graphing calculator. Finally, we provided some tips and tricks for graphing polar equations. We hope that this blog post has been helpful and that you will be able to use the information to graph polar equations on your TI84 Plus.
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