Introduction To 1 Eval I And 1 Solvei; Writing And Entering An Equation - HP -22S Owner's Manual

Introduction to
I
EVAL
I
and
I
SOLVE
I
I
EVAL
I
lets you evaluate an algebraic expression, or evaluate an equa-
tion for a variable that appears by itself on the left side of the
equation.
I
SOLVE
I
lets you solve an equation for any variable.
Writing and Entering an Equation
The equation for calculating the period of a simple pendulum (a pen-
dulum made from a very small object suspended by a very light
string) is:
where T
=
l=
g=
T
=
21f{f
the period of the pendulum.
the length of the string.
the acceleration of gravity, 9.80665 meters/sec
2 •
The equation must be written in a form the HP-22S can interpret:
Equation functions
JI\
T=2x1fxSQRT(L+G)
The following keystrokes enter the equation:
Keys: Display:
.1
EQUATIONS
I
TYPE NEW EQN
ISTOI T
T
Description:
If the list of equations
already contains equa-
tions, press [!] until
the HP-22S displays
this message.
Use
I
STO
I
or
I
RCL
I
to
type a letter.
1: Getting Started 29