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std::acos

De cppreference.com
< cpp‎ | numeric‎ | math

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C++
 
Bibliothèque Numerics
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</div>
 
</div>
Déclaré dans l'en-tête <cmath>
float       acos( float arg );
double      acos( double arg );
long double acos( long double arg );
double      acos( Integral arg );
 (depuis C++11)
Calcule l'arc cosinus de arg
Original:
Computes arc cosine of arg
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Sommaire

[modifier] Paramètres

arg -
valeur du point flottant
Original:
floating point value
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[modifier] Retourne la valeur

Arc cosinus de arg en radians dans la plage de radians [0; π] .
Original:
Arc cosine of arg in radians in the range of [0; π] radians.
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Erreur de domaine se produit si arg est hors de la plage [-1.0; 1.0]. NAN est retourné dans ce cas .
Original:
Domain error occurs if arg is outside the range [-1.0; 1.0]. NAN is returned in that case.
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[modifier] Exemple

#include <cmath>
#include <iostream>
 
int main()
{
    std::cout << "The number pi is " << std::acos(-1) << '\n';
}

Résultat : 

The number pi is 3.14159

[modifier] Voir aussi
arcsinus calcule (arcsin(x))
Original:
computes arc sine (arcsin(x))
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(fonction) [edit]
calcule l'arc tangente (arctan(x))
Original:
computes arc tangent (arctan(x))
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(fonction) [edit]
arc tangente, en utilisant des signes pour déterminer quadrants
Original:
arc tangent, using signs to determine quadrants
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(fonction) [edit]
calcule en cosinus (cos(x))
Original:
computes cosine (cos(x))
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(fonction) [edit]
(C++11)
calcule l'arc cosinus d'un nombre complexe (arccos(z))
Original:
computes arc cosine of a complex number (arccos(z))
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(fonction générique) [edit]
applique la fonction std::acos à chaque élément de valarray
Original:
applies the function std::acos to each element of valarray
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(fonction générique) [edit]
Récupérée de « https://fr.cppreference.com/mwiki/index.php?title=cpp/numeric/math/acos&oldid=48818 »