COMPLEX NUMBERS Polar Form Conversions (Page 11 of 11)

A second method of converting a complex number from polar to rectangular form is to use the Rect command located in the MATH CPX submenu. The advantage of this method is that we can get both the real and imaginary parts with a single command. However, the complex number must be entered using Euler's formula re^(theta*i). Also, the argument θ MUST be in radians (the calculator can be in either radian or degree mode).

Let's use the same complex number again, 3cis150°, and try this new method. Enter the complex number first using the Euler notation, and then follow it with the command. We must enter 150° as 5π/6, and this fraction must be entered within a set of parentheses.

 CLEAR key.

 3 2nd e to the x key. Left parenthesis key. 5 2nd Pi key. Divide key. 6 Right parenthesis key. 2nd i key. Right parenthesis key.
 MATH key. [CPX] 6: menu selection. ENTER key.

Calculator screen image.

Press the right arrow key to scroll to the right and see the rest of the answer.

Copyright © 2010 Turner Educational Publishing
Go back to the previous page. Go to the next page. Go to the Table of Contents. Go to the Index page. Go to the Quiz page. Exit to the Home page.