HP HP-11C - Polar-Rectangular Coordinate Conversions

Section 3: Numeric Functions 51
increase realized between 150 (the base number) and 225 (the
second number in time).
Example )
To Calculate Keystrokes Display
Percent
Base Number 200 200.0000
Percent Rate 75 75
Percentage (9](%) 150.0000
Percent Difference
Base Number 40 40.0000
Second Number 160 160
Percent Increase 300.0000
Polar-Rectangular Coordinate Conversions
Two functions ([#P], [®R]) are pro-
vided in your HP-11C for polar/
rectangular coordinate conversions.
Angle 6 is assumed to be in decimal
degrees, radians, or grads, depending
upon which trigonometric mode
([DEG], [RAD], or [GRD)) the calculator
is set to. Angle 6 is measured as
shown in the illustration to the right.
The answer returned for 0 is between
180° and —180°.
Polar Conversion. Pressing
(polar) converts values in the X-
and Y-registers representing rectan-
gular coordinates (x, y) to polar
coordinates (magnitude r, angle 6).
T+
Z+
Y
X
Keys %