std::acos - cppreference.com

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Elemento definito nell'header `<cmath>`

`float acos( float arg );`

`double acos( double arg );`

`long double acos( long double arg );`

`double acos( Integral arg );`		(dal C++11)

Calcola l'arcocoseno di arg

Original:

Computes arc cosine of arg

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Parametri

arg

valore in virgola mobile

Original:

floating point value

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Valore di ritorno

Arco coseno di arg in radianti nell'intervallo radianti [0; π].

Original:

Arc cosine of arg in radians in the range of [0; π] radians.

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Errore di dominio si verifica se arg è al di fuori del campo di [-1.0; 1.0]. NAN viene restituito in questo caso.

Original:

Domain error occurs if arg is outside the range [-1.0; 1.0]. NAN is returned in that case.

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Esempio

#include <cmath>
#include <iostream>

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

Output:

Vedi anche


asin	calcola arcoseno (arcsin(x)) Original: computes arc sine (arcsin(x)) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione) [modifica]

atan	calcola arco tangente (arctan(x)) Original: computes arc tangent (arctan(x)) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione) [modifica]

atan2	arco tangente, utilizzando le indicazioni per determinare quadranti Original: arc tangent, using signs to determine quadrants The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione) [modifica]

cos	calcola coseno (cos(x)) Original: computes cosine (cos(x)) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione) [modifica]

acos(std::complex) (C++11)	calcola arcocoseno di un numero complesso (arccos(z)) Original: computes arc cosine of a complex number (arccos(z)) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione di modello) [modifica]

acos(std::valarray)	applica la std::acos funzione a ogni elemento di valarray Original: applies the function std::acos to each element of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione di modello) [modifica]