HP 15c - Manual (Page 27)

Section 2: Numeric Functions 27
Hours.Decimal Hours Hours.Minutes Seconds Decimal Seconds
(H.h) (H.MMSSs)
Degrees.Decimal Hours Degrees.Minutes Seconds Decimal Seconds
(D.d) (D.MMSSs)
Hours/Degrees-Minutes-Seconds Conversion. Pressing ´ h
converts the number in the display from a decimal hours/degrees format to
an hours/degree-minutes-seconds-decimal seconds format.
For example, press ´ h to convert
Press ´ u to display the value to all possible decimal places:
Decimal Hours (or Degrees) Conversion. Pressing | À converts the
number in the display from an hours/degrees-minutes-seconds-decimal
seconds format to a decimal hours/degrees format.
Degrees/Radians Conversions
The d and r functions are used to convert angles to degrees
or radians (D.d

R.r). The degrees must be expressed as decimal numbers,
and not in a minutes-seconds format.
Keystrokes Display
40.5
´ r 0.7069
Radians.
| d 40.5000
40.5 degrees (decimal fraction).
1 1 4 0 4 2 0 0 0 0
to the hundred-thousandth of a second.
seconds
hours
1 . 1 4 0 4 1.2 3 4 5
minutes
hours
to