Texas Instruments TI-89 Titanium Manual page 18

A with polar, rectangular form is giving the dimensions of a
vector, but by breaking the vector into two parts a y component
and an x component.
•
Step 1 Change the mode to rectangular output by going into
the mode menu and scroll down to the complex vector and
press enter then choose rectangle
•
Step 2 Enter the equation (can be in either polar or rectangle
form)
•
The results will be:
((35*square root of 3)+35)/2 = 30.311+17.5j
Y = 35 at an angle of 30 degrees