HP 9100B Operating & Programming Manual page 61

THE KEYBOARD
VECTOR KEYS
The vector keys (TO POLAR, TO RECT, ACC+ , ACC-, RCL)
provide complete capability for performing complex or vector
arithmetic.
Conversion from reetangular to polar coordinates will calculate
the angle, 9, in the range;
-180°
<9
< + 180°
- 7Tradians
<9 ::;
+
rr
radians
•
Converts reetangular coordinates, consisting of an x
component in the
X
register and a y component in the
Y
register, to polar coordinates:
Angle (9)
==
Tan- 1 yjx
~
Y
Radius (R)
== -/xz
+
y2
~X
EXAMPLE:
(a): x
==
4,
y
==
3, convert to polar form .
t
y
SWITCH: DEGREES
SWITCH: FIXED POINT
SET: DECIMAL DIGITS to 3
PRESS: 3
t
4
TO
POLAR
DISPLAY: (9, in degrees) 35. B 70
~ ~Y
(R)
5 .DOD
~ ~r
SWITCH:
RADIANS
PRESS:
repeat the preceeding example.
DISPLAY:
(9, in radians)
.6L(4
~
y
(R)
5.DDD
~
.t
51