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std::acos

提供: cppreference.com
< cpp‎ | numeric‎ | math

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Defined in header <cmath>
float       acos( float arg );
double      acos( double arg );
long double acos( long double arg );
double      acos( Integral arg );
 (C++11およびそれ以降)
argの逆余弦を計算します
Original:
Computes arc cosine of arg
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目次

[編集] パラメータ

arg -
浮動小数点値
Original:
floating point value
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[編集] 値を返します

argラジアンの範囲のラジアンで表わした[0; π]のアークコサイン.
Original:
Arc cosine of arg in radians in the range of [0; π] radians.
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argが範囲[-1.0; 1.0]外にある場合、ドメインエラーが発生します。 NANはその場合に返されます.
Original:
Domain error occurs if arg is outside the range [-1.0; 1.0]. NAN is returned in that case.
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[編集] 例

このコードを実行します
#include <cmath>
#include <iostream>
 
int main()
{
    std::cout << "The number pi is " << std::acos(-1) << '\n';
}

出力: 

The number pi is 3.14159

[編集] 参照
アークサイン（arcsin(x)）を計算します
Original:
computes arc sine (arcsin(x))
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(関数) [edit]
アークタンジェント（arctan(x)）を計算します
Original:
computes arc tangent (arctan(x))
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(関数) [edit]
象限を決定するために記号を使用するアークタンジェント、
Original:
arc tangent, using signs to determine quadrants
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(関数) [edit]
計算するコサイン（cos(x)）
Original:
computes cosine (cos(x))
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(関数) [edit]
(C++11)
複素数の逆余弦（arccos(z)）を計算します
Original:
computes arc cosine of a complex number (arccos(z))
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(関数テンプレート) [edit]
valarrayの各要素に関数を適用しstd::acos
Original:
applies the function std::acos to each element of valarray
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(関数テンプレート) [edit]
「http://ja.cppreference.com/mwiki/index.php?title=cpp/numeric/math/acos&oldid=29794」から取得