如何用c++来表示arcsin(x)

[又要开始学习了吗？]

不能使用指数和阶乘函数

[みしつかん]

楼上正解~~~~~~~~~~~~~~~

[赵4老师]

asin Calculates the arcsine. double asin( double x ); Routine Required Header Compatibility asin <math.h> ANSI, Win 95, Win NT For additional compatibility information, see Compatibility in the Introduction. Libraries LIBC.LIB Single thread static library, retail version LIBCMT.LIB Multithread static library, retail version MSVCRT.LIB Import library for MSVCRT.DLL, retail version Return Value The asin function returns the arcsine of x in the range –π/2 to π/2 radians. If x is less than –1 or greater than 1, asin returns an indefinite (same as a quiet NaN). You can modify error handling with the _matherr routine. Parameter x Value whose arcsine is to be calculated Example /* ASINCOS.C: This program prompts for a value in the range * -1 to 1. Input values outside this range will produce * _DOMAIN error messages.If a valid value is entered, the * program prints the arcsine and the arccosine of that value. */ #include <math.h> #include <stdio.h> #include <stdlib.h> #include <errno.h> void main( void ) { double x, y; printf( "Enter a real number between -1 and 1: " ); scanf( "%lf", &x ); y = asin( x ); printf( "Arcsine of %f = %f\n", x, y ); y = acos( x ); printf( "Arccosine of %f = %f\n", x, y ); } Output Enter a real number between -1 and 1: .32696 Arcsine of 0.326960 = 0.333085 Arccosine of 0.326960 = 1.237711 Floating-Point Support Routines See Also acos, atan, cos, _matherr, sin, tan