HP 39gs - Manual (Page 171)

Using mathematical functions 13-19
= = Equals (logical test). Returns 1 if true, 0 if false.
value1==value2
≠ Not equal to. Returns 1 if true, 0 if false.
value1≠value2
> Greater than. Returns 1 if true, 0 if false.
value1>value2
≥ Greater than or equal to. Returns 1 if true, 0 if false.
value1≥value2
AND Compares value1 and value2. Returns 1 if they are both
non-zero, otherwise returns 0.
value1 AND value2
IFTE If expression is true, do the trueclause; if not, do the
falseclause.
IFTE(expression, trueclause, falseclause)
Example
IFTE(X>0,X 2 ,X 3 )
NOT Returns 1 if value is zero, otherwise returns 0.
NOT value
OR Returns 1 if either value1 or value2 is non-zero, otherwise
returns 0.
value1 OR value2
XOR Exclusive OR. Returns 1 if either value1 or value2—but
not both of them—is non-zero, otherwise returns 0.
value1 XOR value2
Trigonometry functions
The trigonometry functions can also take complex
numbers as arguments. For SIN, COS, TAN, ASIN,
ACOS, and ATAN, see the Keyboard category.
ACOT Arc cotangent.
ACOT(value)
HP 39gs English.book Page 19 Wednesday, December 7, 2005 11:24 PM