HP 35s User Manual page 119

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Eight of the equation functions have names that differ from their equivalent
operations:
RPN Operation
Example: Perimeter of a Trapezoid.
The following equation calculates the perimeter of a trapezoid. This is how the
equation might appear in a book:
The following equation obeys the syntax rules for HP 35s equations:
2
x
x
x
e
x
10
1/x
y
X
x
y
INT÷
Perimeter = a + b + h (
a
h
Entering and Evaluating Equations
Equation function
1
sin sin
b
SQ
SQRT
EXP
ALOG
INV
XROOT
^
IDIV
1
)
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