std::acos

 

C++

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Понятия (концепции)

Утилиты

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Контейнеры

Алгоритмы

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Работа с числами

Ввод / вывод

Локализация

Регулярные выражения (C++11)

Атомарные примитивы (C++11)

Потоки (C++11)

 

Numerics библиотеки

Общие математические функции

Плавающей точкой окружающей среды

Комплексные числа

Числовых массивов

Псевдослучайных чисел поколения

Во время компиляции рациональной арифметики (C++11)

Generic числовые операции Original: Generic numeric operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

iota (C++11)

accumulate

inner_product

adjacent_difference

partial_sum

 

Общие математические функции

Функции Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Основные операции Original: Basic operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
abs(int) labs llabs imaxabs (C++11) abs(float) fabs div ldiv lldiv imaxdiv (C++11) fmod	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)
Экспоненциальной функции Original: Exponential functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
exp exp2 (C++11) expm1 (C++11)	log log10 log1p (C++11) log2 (C++11)
Мощность функций Original: Power functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
sqrt cbrt (C++11)	hypot (C++11) pow
Тригонометрические и гиперболические функции Original: Trigonometric and hyperbolic functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
sin cos tan asin acos atan atan2	sinh cosh tanh asinh (C++11) acosh (C++11) atanh (C++11)

Ошибка и гамма-функции Original: Error and gamma functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
erf (C++11) erfc (C++11)	lgamma (C++11) tgamma (C++11)
Ближайшее целое число операций с плавающей точкой Original: Nearest integer floating point operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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)
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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)
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HUGE_VALF HUGE_VAL HUGE_VALL (C++11) (C++11) INFINITY (C++11) NAN (C++11) math_errhandling MATH_ERRNO MATH_ERREXCEPT (C++11)	FP_NORMAL FP_SUBNORMAL FP_ZERO FP_INFINITE FP_NAN (C++11) (C++11) (C++11) (C++11) (C++11)

 

Заголовочный файл <cmath>
float       acos( float arg );
double      acos( double arg );
long double acos( long double arg );
double      acos( Integral arg );		(начиная с C++11)

Вычисляет арккосинус arg

Original:

Computes arc cosine of arg

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Параметры

arg

-

плавающей точкой Original: floating point value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Возвращаемое значение

Арккосинус arg в радианах в диапазоне от [0; π] радианах.

Original:

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

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Домен ошибка возникает, если arg находится за пределами диапазона [-1.0; 1.0]. NAN возвращается в том случае.

Original:

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

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Пример

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

Вывод:

The number pi is 3.14159

См. также

asin	вычисляет арксинус (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. (функция)
atan	вычисляет арктангенс (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. (функция)
atan2	арктангенс, с использованием знаков для определения квадранта 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. (функция)
cos	вычисляет косинус (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. (функция)
acos(std::complex) (C++11)	вычисляет арккосинус комплексное число (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. (шаблон функции)
acos(std::valarray)	применяет функцию std::acos к каждому элементу 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. (шаблон функции)