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    std::acos

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    <metanoindex/>

     
    C++
     
    Bibliothèque Numerics
    Fonctions mathématiques courantes
    Virgule flottante environnement
    Nombres complexes
    Tableaux numériques
    La génération de nombres pseudo-aléatoires
    Moment de la compilation arithmétique rationnelle (C++11)
    Génériques des opérations numériques
    Original:
    Generic numeric operations
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    iota (C++11)
    accumulate
    inner_product
    adjacent_difference
    partial_sum
     
    Fonctions mathématiques courantes
    {{{1}}}
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    {{{2}}}
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    Fonctions
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    Functions
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    Opérations de base
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    Basic operations
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    remainder (C++11)
    remquo (C++11)
    fma (C++11)
    fmax (C++11)
    fmin (C++11)
    fdim (C++11)
    nan
    nanf
    nanl    		 (C++11)
    (C++11)
    (C++11)
    Les fonctions exponentielles
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    Exponential functions
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    exp
    exp2 (C++11)
    expm1 (C++11)
    log
    log10
    log1p (C++11)
    log2 (C++11)
    Les fonctions de puissance
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    Power functions
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    sqrt
    cbrt (C++11)
    hypot (C++11)
    pow
    Les fonctions trigonométriques et hyperboliques
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    Trigonometric and hyperbolic functions
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    sinh
    cosh
    tanh
    asinh (C++11)
    acosh (C++11)
    atanh (C++11)
    {{{1}}}
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    {{{2}}}
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    Erreur fonctions et gamma
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    Error and gamma functions
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    erf (C++11)
    erfc (C++11)
    lgamma (C++11)
    tgamma (C++11)
    Entier le plus proche opérations en virgule flottante
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    Nearest integer floating point operations
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    ceil
    floor
    round
    lround
    llround    		 (C++11)
    (C++11)
    (C++11)
    trunc (C++11)
    nearbyint (C++11)
    rint
    lrint
    llrint    		 (C++11)
    (C++11)
    (C++11)
    Flottant fonctions de manipulation de points
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    Floating point manipulation functions
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    ldexp
    scalbn
    scalbln    		 (C++11)
    (C++11)
    ilogb (C++11)
    logb (C++11)
    frexp
    modf
    nextafter
    nexttoward    		 (C++11)
    (C++11)
    copysign (C++11)
    Classification / Comparaison
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    Classification/Comparison
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    fpclassify (C++11)
    isfinite (C++11)
    isinf (C++11)
    isnan (C++11)
    isnormal (C++11)
    signbit (C++11)
    isgreater (C++11)
    isgreaterequal (C++11)
    isless (C++11)
    islessequal (C++11)
    islessgreater (C++11)
    isunordered (C++11)
    Macro constantes
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    Macro constants
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    FP_NORMAL
    FP_SUBNORMAL
    FP_ZERO
    FP_INFINITE
    FP_NAN    		 (C++11)
    (C++11)
    (C++11)
    (C++11)
    (C++11)
     
    <tbody> </tbody>
    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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    Paramètres

    arg -
    valeur du point flottant
    Original:
    floating point value
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    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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    Exemple

    #include <cmath>
#include <iostream>

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

    Résultat : 

    The number pi is 3.14159

    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]