Texas Instruments TI-60 Owner's Manual page 47

CHAPTER 1-6
CONVERSION KEYS
Section 6 — Conversion Keys
Several key* convert unit* from one system l0 another and back. Most ol
I be conversions are from (he English system of measurement which most
Americans use. to (he more convenient metric system used by most of the
real of the world and in scientific and engineering calculations The hnal
conversions are from the polar expression of points which are graphed to
the rectangular system of expression and from degrees/mmutes/9econds to
degrees and decimal degrees
■ a nd
;f(NLi indJrF-'CJ — Fahrenheit/Centigrade conversion keys
These keys convert degrees Fahrenheit to degrees Centigrade and beck. The
formulas used aro:
•C - *x (*F - 32):
-F --J x «C ♦ 32
2nd [gaH) INV 2nd ] |gal-l] — U.S. Gailon/Htre conversion keys
These keys convert U S gallons to litres and back The formulas used are
gal - 3 785411784 x I , I « gal + 3 785411784
Note 1 Imperial gallon - 1 20095 U S gallons
2nd (irvemj. INV 2nd [Irvcm] — Inch/Centimetre conversion keys
These keys convert inches lo centimetres and back The formulas used are
In - 2 54 x cm . cm = in + 2 54
2nd pb-kg) INV 2nd pb-kg] — Pound/Kllogrnm conversion keys
These keys convert pounds to kilograms and back. The formulas used are
I) - 0 45358237 x kg ; kg - lb + 0.45358237
2nd [P-R| INV ;2nd [P-R] - Polar,Rectangular conversion keys
The rectangular coordinate system describes where points are placed on a
gnd with a pair of numbers The first, the x-coordinate. describes the distance
ol the point from the y-axls, which Is a vehicle line The second, the y-
coordinate. describes the distance ol the point from the x-axis, which is a
horizontal Ime The following shows the point described in rectangular
coordinates as (1. v3)
J.
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