Atan2 :

1. Interpret it as - A tan 2
2. '2' Means It Takes Two Parameters
3. The atan2() function computes the arc tangent of Y/X
4. Signs of the arguments is used to compute the quadrant of the return value .
5. Header File : Math.h

Syntax :

double atan2(double y,double x);

• Return Value : Double [ Arc Tangent of Ratio Y/X ]
• No Of Parameters : 2
• Double X : Floating point value representing an X-Co-Ordinate
• Double Y : Floating point value representing an Y-Co-Ordinate

Live Example :

#include< stdio.h>
 #include< math.h>
 int main(void)
 {
    double res;
    double x = 90.0, y = 45.0;
    res = atan2(y, x);
    printf("The arc tangent ratio of %lf is %lf\n",(y/x),res);
    return 0;
 }

Output :

The arc tangent ratio of 0.500000 is 0.463648

How to Convert Number into Degree :
Using Following Statement -

result = atan2(y,x)*180/M_PI;

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Tags / Keywords : | Acos, asin, atan, atan2, atan2l, cos, math.h, sin, tan

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