HP 33s Scientific Time Conversions, 12Real-Number Functions, Example Converting Time Formats

R

C

X c

R

θ

_36.5o

77.8 ohms

Keys:	Display:	Description:
Ÿ{}		Sets Degrees mode.
￿ 36.5 ^‘	. )	Enters θ, degrees of voltage lag.
77.8	)_	Enters r, ohms of total impedance.
s	)	Calculates x, ohms resistance, R.
[	. ) 	Displays y, ohms reactance, XC.

For more sophisticated operations with vectors (addition, subtraction, cross product, and dot product), refer to the "Vector Operations" program in chapter 15, "Mathematics Programs".

Time Conversions

Values for time (in hours, H) or angles (in degrees, D) can be converted between a decimal–fraction form (H.h or D.d) and a minutes–seconds form (H.MMSSss or D.MMSSss) using the {tor ukeys.

To convert between decimal fractions and minutes–seconds:

1.Key in the time or angle (in decimal form or minutes–seconds form) that you want to convert.

2.Press uor {t. The result is displayed.

Example: Converting Time Formats.

How many minutes and seconds are there in 1/7 of an hour? Use FIX 6 display format.

Keys:	Display:	Description:
{%} 6		Sets FIX 6 display format.
1 7	+ _	1/7 as a decimal fraction.

4–12Real–Number Functions