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Converting Angular Measure - HP -28S Manual

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Converting Angular Measure
The TRIG menu contains commands that convert an angle from one
system of measurement to another. These commands are on the third
row of the TRIG menu. Take a quick look at the second row before
continuing to the third.
Display the second row of the TRIG menu.
I
NEXT
I
r:::3~:-------------'
2:
-2.06761537357E-13
1:
0
DDlIDDIDBlBDlEIB_
These commands deal with complex numbers and are duplicated in
the COMPLEX menu. Complex numbers are described in the next
chapter.
Display the third row of the TRIG menu.
~----------------------~
I
NEXT
I
3:
2:
-2. 06761537357E-13
1:
0
mmCIDDClDillCIII!iIIGDlIIlm1I
You'll use the commands HMS- and D-R to convert an angle ex-
pressed in degrees, minutes, and seconds to an angle expressed in
radians.
The four HMS (hours-minutes-seconds) commands enable you to calcu-
late with numbers whose fractional parts are expressed as minutes
and seconds. Such numbers must have the following special format,
called the HMS format:
h.MMSSs
where h represents hours (or degrees), MM represents minutes, SS
represents seconds, and s represents decimal fraction of seconds. MM
and SS each represent two digits; hand s each represent any number
of digits.
The commands -HMS (decimal-to-HMS) and HMS- (HMS-to-decimal)
convert a real number between the normal decimal format and the
special HMS format. The commands HMS+ (HMS plus) and HMS-
(HMS minus) add and subtract numbers in HMS format, with the re-
sult also in HMS format.
76
5: Real-Number Functions

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