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std::asinh

STD：：asinh

Defined in header ​​
float asinh( float arg (1)(since C++11)
double asinh( double arg (2)(since C++11)
long double asinh( long double arg (3)(since C++11)
double asinh( Integral arg (4)(since C++11)

反双曲正弦的计算arg...

4%29一组过载或接受任意参数的函数模板积分型等于2%29%28double29%。

参数

arg-value of a floating-point or Integral type

返回值

如果没有误差，则反双曲正弦arg%28新华-1

返回%28 arg%29或arsinh%28 arg%29%29。

如果由于下流而发生范围错误，则返回舍入%29后的正确结果%28。

错误处理

错误按数学[医]错误处理...

如果实现支持ieee浮点算法%28IEC 60559%29，

  • 如果参数为±0或±∞，则不加修改地返回参数。

  • 如果参数为nan，则返回nan。

注记

虽然C++所指的C标准%28将此函数命名为“弧双曲正弦”，但双曲函数的反函数是面积函数。他们的论点是双曲区，而不是弧线区。正确的名称是POSIX%29使用的“反双曲正弦”%28或“面积双曲正弦”。

实例

二次

#include <iostream>
#include <cmath>
 
int main()
{
    std::cout << "asinh(1) = " << std::asinh(1) << '\n'
              << "asinh(-1) = " << std::asinh(-1) << '\n';
    // special values
    std::cout << "asinh(+0) = " << std::asinh(+0.0) << '\n'
              << "asinh(-0) = " <<  std::asinh(-0.0) << '\n';
}

二次

产出：

二次

asinh(1) = 0.881374
asinh(-1) = -0.881374
asinh(+0) = 0
asinh(-0) = -0

二次

另见

acosh (C++11)computes the inverse hyperbolic cosine (arcosh(x)) (function)
atanh (C++11)computes the inverse hyperbolic tangent (artanh(x)) (function)
sinhcomputes hyperbolic sine (sh(x)) (function)
asinh(std::complex) (C++11)computes area hyperbolic sine of a complex number (function template)

c为asinh编写的文件

外部链接

逆双曲正弦波。来自MathWorld的一个Wolfram Web资源。

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在CreativeCommonsAttribution下授权-ShareAlike未移植许可v3.0。

http：//en.cppreference.com/w/cpp/数值/数学/asinh

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