HP 33s - Manual (Page 107)

Entering and Evaluating Equations 6–15
Equation Functions
The following table lists the functions that are valid in equations. Appendix G,
"Operation Index" also gives this information.
LN LOG EXP ALOG SQ SQRT
INV IP FP RND ABS x!
SGN INTG IDIV RMDR
SIN COS TAN ASIN ACOS ATAN
SINH COSH TANH ASINH ACOSH ATANH
€ DEG € RAD € HR € HMS %CHG XROOT
CB CBRT Cn,r Pn,r
€ KG € LB € °C € °F € CM € IN
€ L € GAL RANDOM π
+ – Ч ч ^
sx sy σ x σ y
x
y
x
w xˆ
yˆ
r m b
n Σx Σy Σx 2 Σy 2 Σxy
For convenience, prefix–type functions, which require one or two arguments,
display a left parenthesis when you enter them.
The prefix functions that require two arguments are %CHG, RND, XROOT, IDIV,
RMDR, Cn,r and Pn,r. Separate the two arguments with a colon.
In an equation, the XROOT function takes its arguments in the opposite order from
RPN usage. For example, –8
‘ 3 to is equivalent to % !1(. 2.
All other two–argument functions take their arguments in the Y, X order used for
RPN. For example, 28
‘ 4 { \ is equivalent to Q8T1 (2.
For two–argument functions, be careful if the second argument is negative. For a
number or variable, use
^ or . These are valid equations: