HP HP-21 - Page 64

Charging time, 7, 54
Clearing, 8, 25, 28-29, 41
Clear x, 8, 28,29
Common antilogarithm, 49
Common logarithm, 49
Constant arithmetic, 36
Cosine, 43
D
Decimal points, all, 56
Degree/radian switch, 44
Direction of execution, 34
Display, 17-23
all 9’s, 24
automatic switching, 20
blank, 56
control, 17
error, 38
fixed decimal point, 18
low power, 56
scientific, 19
Duplication of T-register, 34, 36
E
e, use of, 48
Enter exponent, 21-22
Enter, 10, 27, 28
Error display, 38
Exchanging x and y, 37
Execution, direction of, 34
Exponential functions, 50
Exponents of ten, 19, 21
F
Fixed decimal point display, 18
Function keys
one-number, 9
two-number, 10
Improper operations, 38, 59
Index, keyboard, §
Intermediate results, 12-16, 25
Internal accuracy, 17, 20
K
Keyboard, 4