Atan() - C library function Program
Declaration :
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double atan(double x) |
Explanation :
| Purpose | The C library function double atan(double x) returns the arc tangent of x in radians. |
| Parameters | x ===> This is the floating point value. |
| Return Value | This function returns the principal arc tangent of x in the interval [-pi/2+pi/2] radians. |
| Exception |
C Program : Example
The following example shows the usage of atan() function.
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#include <stdio.h> #include <math.h> #define PI 3.14159265 int main () { double x, ret, val; x = 1.0; val = 180.0 / PI; ret = atan (x) * val; printf("The arc tangent of %lf is %lf degrees", x, ret); return(0); } |