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# atan2

From cppreference.com
< c‎ | numeric‎ | math

Defined in header `<math.h>` |  |
float atan2f( float y, float x ); |  | (since C99)
double atan2( double y, double x ); |  | (since C99)
long double atan2l( long double y, long double x ); |  | (since C99)

Computes the inverse tangent of `y/x` using the signs of arguments to correctly determine quadrant.

### [edit] Parameters

x, y | - | floating point value

### [edit] Return value

Arc tangent of `y/x` in radians in the range of `[-π; π]` radians.

### [edit] Example

| This section is incomplete Reason: no example

### [edit] See also

atan | computes arc tangent (arctan(x)) (function) [edit]
asin | computes arc sine (arcsin(x)) (function) [edit]
acos | computes arc cosine (arccos(x)) (function) [edit]
tan | computes tangent (tan(x)) (function) [edit]
C++ documentation for atan2

Retrieved from "http://en.cppreference.com/mwiki/index.php?title=c/numeric/math/atan2&oldid=62562"
Category:

- Todo no example