
Chapter 15 Functions
15-15
ATN2 (Function) [Conforms to SLIM]
Function
Obtains the arc tangent of expression 1 divided by expression 2.
Format
ATN2 (<Expression1>, <Expression2>)
Explanation
This statement obtains the arc tangent value of <Expression1> divided by
<Expression2>.
The unit of the obtained value is degrees and its range is from -180 to 180.
If <Expression> includes a double precision real numeral, the obtained value
becomes double precision. Otherwise, a single precision value is obtained.
The following is a value range of ATN2.
First
quadrant
Second
quadrant
Third
quadrant
Fourth
quadrant
Lower limit
value 0 90 -180 -90
Upper limit
value 90 180 90 - 0
Related Terms
SIN, COS, TAN, ASIN, ACOS, ATN
Example
DEFSNG lf1, lf2, lf3, lf4, lf5, lf6, lf7, lf8
lf1 = ATN2(1, 2) 'Assigns the arc tangent value of (1, 2) to lf1.
lf2 = ATN2(lf4, lf5)
'Assigns the arc tangent value of (lf4, lf5) to lf2
.
lf3 = ATN2(lf6, lf7) * lf8 'Assigns the arc tangent value of (lf6, lf7)
'multiplied by lf8 to lf3.
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