HP -225 Owner's Manual page 195

Scientific calculator
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DEG function, in equations, 81
Degrees mode, 45
Degrees to radians, 46-47
Density of a gas, 101
{DG}, 45
Differential equation, 106-107
Diffraction, 106
Digit entry, 15
Discontinuous function, 160, 161-162
DISP menu, 16-17, 23-25
B(oisp), 16-17, 18, 23-25
Display
clearing, 15
contrast, 12
messages. se¢ Messages
mode, 22-25
Distance between two locations,
131-132
DIVIDE BY 0, 173
@(o-RAD], 18, 46-47
B, 25
B(EoiT), 72, 74
Effective interest rate, 132-134
Electrostatic force, 98-99
{EN}, 24
Energy, kinetic, 97
Engineering notation, 24
Entering equations, 73
Environmental limits, 147
Equation library, 91-112
Equation library, calculations with,
91
Equations
clearing, 28, 74
editing, 74
entering, 73
functions in, 79-86
length of, 78
memory requrements, 145
prompting for variables, 75
scrolling, 74
selecting, 74
syntax of, 78
viewing, 74
@(EQuATIONS ] , 72
Equations of motion, 88, 94-96
Error messages. See Messages
Estimations, statistical, 63
criteria for using, 75
introduction to, 29-30
used to evaluate expressions, 75-76
using, 70-90
Evaluating equations, 70-90
EXP function, 81
Exponential functions, 42
Exponential model, 122-123
Exponential numbers
in equations, 78
keying in, 25
Exponentiation, 13, 32
EXPR label, 75
Expressions, evaluating, 75-76
(&), 42
F
°F function, 83
{+"F}, 53
FACT function, 81
Factorial function
in equations, 81
in keyboard calculations, 51
Fahrenheit to Celsius, 53
Financial calculations, 109-112, 134~
138
First order differential equation,
106-107
FIX format, 23
Flat region of functions, 168
Fluid pressure, 102-103
Force, equations for, 98-99
Format of numbers, 22-25
FP, 52
FP function
in equations, 81
in keyboard calculations, 52
Fractional part, 52
Free energy, 102
Free-fall, 96
Index
187

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