 Polar Coordinates Let's start by examining the commands used to convert between rectangular and polar coordinates:
Our primary menu of commands is listed under ANGLE.
Press 2nd APPS (ANGLE) to open this menu. Change Rectangular to Polar: Option #5: R►P r is the
rectangular to polar
conversion
that returns only the r value.
Format:   R►P r (x,y) Option #6: R►P ( is the rectangular to polar conversion
that returns only the value.
Format:  R►P (x,y)

 Change Polar  to Rectangular: Option #7:  P►Rx ( is the
polar to rectangular conversion
that returns the x value.
Format:   P►Rx (x,y) Option #8:  P►Ry ( is the
polar to rectangular conversion that returns
the y value.
Format:   P►Ry (x,y)

Examples:
1.  Convert to polar form.
We need to find the corresponding (r, ) values for the given (x,y) values.

Options #5: R►P r and
#6: R
►P (  give:  NOTE: Answer:  (2, 2.618) or  ________________________________________________________________

2.  Convert to rectangular form.
We need to find the corresponding (x,y) values for the given (r, ) values.

Options #7:  P►Rx ( and
#8:  P►Ry (  give:  NOTE: Answer:  (1.732, 1)  or Since the stated coordinates are expressed in RADIAN form, set the calculator to RADIAN mode. 