# TI-84 and Complex Numbers

1. Apr 29, 2010

### 1st1

Hi,

I am having some difficulty understanding what is going on with the TI-84 complex number calculation in switching between rectangular and polar coordinates, hopefully someone can clarify this for me. For example, take the term 6<30 (6 angle 30). When I calculate this by hand going from polar to rectangular I get 5.196 + 3i. However, if I try to switch 6<30 into rectangular coordinates with my TI-84 I get 0.926 + 5.93i. Can anyone explain to me what is happening?

2. Apr 29, 2010

### Gigasoft

3. Apr 29, 2010

### 1st1

The calculator is set to degrees, not radians. I've checked.
However if I put the angle in as radians it does work.
Maybe it only works with radians even though I'm in degree mode.

Last edited: Apr 29, 2010
4. Apr 29, 2010

### Integral

Staff Emeritus
rtfm

5. Apr 29, 2010

### 1st1

Ok, I figured it out thanks for the input.