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X-Hacker.org- Watcom C Library Reference - <u>synopsis:</u>
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Synopsis:
#include <math.h>
double atan( double x );
Description:
The atan function computes the principal value of the arctangent of x.
Returns:
The atan function returns the arctangent in the range (-P/2,P/2).
Example:
#include <stdio.h>
#include <math.h>
void main()
{
printf( "%f\n", atan(.5) );
}
produces the following:
0.463648
Classification:
ANSI
Systems:
Math
See Also:
acos, asin, atan2
See Also: acos asin
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