Question

已知sin(x)≈x¹/1!-x³/3!-x7/7!+...试编程求sin(x)的近似值,知道某一项

Answer 1

#include

#include

long jiecen(int m);

int main()

{

double x;

std::coutx;

double a=x/1;

int b=1;

double sum=0;

while(fabs(a)>0.00001)

{

sum=sum+a;

b=b+2;

a=(-1)*x*x / (jiecen(b));

}

std::cout