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Entering And Evaluating Equations; How You Can Use Equations - HP 35s User Manual

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Entering and Evaluating Equations

How You Can Use Equations

You can use equations on the HP 35s in several ways:
For specifying an equation to evaluate (this chapter).
For specifying an equation to solve for unknown values (chapter 7).
For specifying a function to integrate (chapter 8).
Example:
Calculating with an Equation.
Suppose you frequently need to determine the volume of a straight section of pipe.
The equation is
where d is the inside diameter of the pipe, and l is its length.
You could key in the calculation over and over; for example,

volume of 16 inches of 2
by storing the equation, you get the HP 35s to "remember" the relationship between
diameter, length, and volume — so you can use it many times.
Put the calculator in Equation mode and type in the equation using the following
keystrokes:
V = .25
1
/
–inch diameter pipe (78.5398 cubic inches). However,
2
Entering and Evaluating Equations
2
d
l
6
calculates the
6-1

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