Calculators How Do You Graph Polar Equations on a TI-89?

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To graph polar equations like r = 5 + 5 sin(theta) on a TI-89, ensure the calculator is set to polar mode. The recommended settings include setting the angle to radians instead of degrees, as this is crucial for accurate graphing in polar coordinates. Other settings such as Graph mode (Polar), Display Digits (Float G), and Exponential Format (Normal) can remain unchanged. Adjusting the angle to radians should resolve the issue of the graph not displaying correctly.
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Hey, I'm having trouble graphing polar equations in my TI-89. I just bought it and still don't understand how it works. For example I have r = 5 + 5 sin(theta). It's suppose to look like a upside apple thing (kind of). But I don't know how to get the graph to show up. I know I'm doing something wrong with my mode. Here is what my mode is set to:

Graph - Polar
Current Folder - Main
Display Digits - Float G
Angle - Degree
Exponential Format - Normal
Complex Format - Rectangular
Vector Format - Rectangular
Pretty Print - Off

Can someone tell me what I'm doing wrong? Thanks!
 
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d.tran103 said:
Hey, I'm having trouble graphing polar equations in my TI-89. I just bought it and still don't understand how it works. For example I have r = 5 + 5 sin(theta). It's suppose to look like a upside apple thing (kind of). But I don't know how to get the graph to show up. I know I'm doing something wrong with my mode. Here is what my mode is set to:

Graph - Polar
Current Folder - Main
Display Digits - Float G
Angle - Degree
Exponential Format - Normal
Complex Format - Rectangular
Vector Format - Rectangular
Pretty Print - Off

Can someone tell me what I'm doing wrong? Thanks!

Ok, off the bat I'd recommend setting the "angle" to "Radian" for polar mode. Got the same settings on mine pretty much otherwise.
 
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