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Keys:
Display:
Description:
s
Sets Degrees mode.
10
10.0000
Enters x.
15
Y
—56.3099
Enters y, calculates r
and 6, and displays 6.
(«]
18.0278
Displays 7.
Convert the polar coordinates (7, 30°) to rectangular coordinates:
7
7.0000
Enters r.
30 (]
3.5000
Enters 6, calculates x
and y, and displays y.
=)
6.0622
Displays x.
Probability Functions
Your HP-20S can calculate factorials, combinations, and
permutations.
Factorial. Pressing [¢>][n!] calculates the factorial of the number in
the display. The number must be an integer in the range 0 through
253.
Combinations and Permutations. The keystrokes for calculating
combinations and permutations are:
n-value
r-value (]
or
n-value
r-value [¢>]
3: Numeric Functions
39
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