HP HP-21 - Polar;Rectangular Coordinate Conversion

Press Display
61.22 B [x]
-G
60 [x] Distance from Queequeg’s
position to Anchorage,
Alaska.
Queequeg’s shortest, although not his warmest, journey will
be to Anchorage.
Polar/Rectangular Coordinate Conversion
Two functions are provided for polar/rectangular coordinate
conversion. To convert values in the X-and Y-registers,
(representing rectangular x, y coordinates, respectively) to
polar r, 6 coordinates (magnitude and angle, respectively),
press 8 [-r). Magnitude r then appears in the X-register and
angle 0 appears in the Y-register.
Conversely, to convert values in the X- and Y-registers (repre-
senting polar coordinates, r, 6, respectively) to rectangular
coordinates (X, y, respectively), press [l [-7].
Example 1: Convert rectangular coordinates (4,3) to polar
form with the angle expressed in radians.
Y
————————————————————
(4,3)
|
|
|
|
|
|
|
|
|
|
1
|
|
= X
Solution: Make certain the Degree/Radian switch is in the
Radians position: oec [ ~o .
Press Display
3 450 Magnitude.
PR Angle in radians.