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std::atan2

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Defined in header <cmath>
float       atan2( float y, float x );
 (1)
double      atan2( double y, double x );
 (2)
long double atan2( long double y, long double x );
 (3)
Promoted    atan2( Arithmetic y, Arithmetic x );
 (4) (desde C++11)
Calcula la tangente inversa de y/x utilizando los signos de argumentos para determinar correctamente cuadrante .
Original:
Computes the inverse tangent of y/x using the signs of arguments to correctly determine quadrant.
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4)
Si algún argumento es de tipo integral, que se convierte en double. Si cualquier otro argumento es long double, entonces el tipo de retorno es long double, de lo contrario es double .
Original:
If any argument has integral type, it is cast to double. If any other argument is long double, then the return type is long double, otherwise it is double.
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Contenido

[editar] Parámetros

x, y -
flotando valor en puntos
Original:
floating point value
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[editar] Valor de retorno

Arco tangente de y/x en radianes en el intervalo de radianes [-π; π] .
Original:
Arc tangent of y/x in radians in the range of [-π; π] radians.
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Return value
math-atan2.png
X argument

[editar] Ejemplo

#include <cmath>
#include <utility>
#include <iostream>
 
std::pair<double, double> cartesian_to_polar(double x, double y)
{
    return {std::hypot(x, y), std::atan2(y,x)};
}
 
int main()
{
    std::pair<double, double> polar = cartesian_to_polar(1, 1);
    std::cout << "(1,1) cartesian is (" << polar.first
               << "," << polar.second<< ") polar\n";
}

Output: 

(1,1) cartesian is (1.41421,0.785398) polar


[editar] Ver también
calcula arco tangente (arctan(x))
Original:
computes arc tangent (arctan(x))
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(función) [edit]
calcula arcoseno (arcsin(x))
Original:
computes arc sine (arcsin(x))
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(función) [edit]
calcula arco coseno (arccos(x))
Original:
computes arc cosine (arccos(x))
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(función) [edit]
calcula la tangente (tan(x))
Original:
computes tangent (tan(x))
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(función) [edit]
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