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在头文件<math.h>中定义



float sinhf(float arg);

(1)

(自C99以来)

double sinh(double arg);

(2)


long double sinhl(long double arg);

(3)

(自C99以来)

在头文件<tgmath.h>中定义



#define sinh(arg)

(4)

(自C99以来)

1-3)计算双曲正弦arg

4)类型 - 通用宏:如果参数具有类型long doublesinhl则被调用。否则,如果参数具有整数类型或类型doublesinh则调用该参数。否则,sinhf被调用。如果参数是复杂的,则宏调用相应的复变函数(csinhfcsinhcsinhl)。

参数

arg

-

浮点值代表双曲线角度

返回值

如果没有错误发生,arg(sinh(arg)或者双曲正弦

| earg-e-arg |

|:----|

| 2 |

)返回。

如果范围误差由于发生溢出,或返回±HUGE_VAL±HUGE_VALF,或±HUGE_VALL

如果由于下溢而发生范围错误,则返回正确的结果(舍入后)。

错误处理

按照math_errhandling中的指定报告错误。

如果实现支持IEEE浮点运算(IEC 60559),

  • 如果参数为±0或±∞,则不加修改地返回

  • 如果参数是NaN,则返回NaN

注意

POSIX指定在发生下溢时,arg未经修改就返回,如果不支持,则返回不大于DBL_MIN,FLT_MIN和LDBL_MIN的实现定义值。

示例


#include <stdio.h>#include <math.h>#include <errno.h>#include <fenv.h>
 #pragma STDC FENV_ACCESS ON
int main(void){    printf("sinh(1) = %f\nsinh(-1)=%f\n", sinh(1), sinh(-1));    printf("log(sinh(1) + cosh(1))=%f\n", log(sinh(1)+cosh(1)));    // special values    printf("sinh(+0) = %f\nsinh(-0)=%f\n", sinh(0.0), sinh(-0.0));    // error handling 
    errno=0; feclearexcept(FE_ALL_EXCEPT);    printf("sinh(710.5) = %f\n", sinh(710.5));    if(errno == ERANGE) perror("    errno == ERANGE");    if(fetestexcept(FE_OVERFLOW)) puts("    FE_OVERFLOW raised");}


可能的输出:


sinh(1) = 1.175201sinh(-1)=-1.175201log(sinh(1) + cosh(1))=1.000000sinh(+0) = 0.000000sinh(-0)=-0.000000sinh(710.5) = inf
    errno == ERANGE: Numerical result out of range
    FE_OVERFLOW raised


参考

  • C11标准(ISO/IEC 9899:2011):

    • 7.12.5.5 sinh函数(p:241-242)

    • 7.25类型通用数学<tgmath.h>(p:373-375)

    • F.10.2.5 sinh函数(p:520)

  • C99标准(ISO/IEC 9899:1999):

    • 7.12.5.5 sinh函数(p:222)

    • 7.22类型通用数学<tgmath.h>(p:335-337)

    • F.9.2.5 sinh函数(p:457)

  • C89/C90标准(ISO/IEC 9899:1990):

    • 4.5.3.2 sinh函数

另请参阅

coshcoshfcoshl(C99)(C99)

计算双曲余弦(ch(x))(函数)

tanhtanhftanhl(C99)(C99)

计算双曲正切(函数)

asinhasinhfasinhl(C99)(C99)(C99)

计算反双曲正弦(arsinh(x))(函数)

csinhcsinhfcsinhl(C99)(C99)(C99)

计算复数双曲正弦函数(函数)

| C ++文档sinh |

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