C语言题fun（x）=1-(x2\2!)+(x4\4!)-(x6\6!).....+(x2n\2n!)((-1)n+1)有一个fun（x）=1-(x2\2!)+(x4\4!)-(x6\6!).....+(x2n\2n!)((-1)n+1)求COSXC语言。求解。先谢谢。

Question

C语言题fun（x）=1-(x2\2!)+(x4\4!)-(x6\6!).....+(x2n\2n!)((-1)n+1)有一个fun（x）=1-(x2\2!)+(x4\4!)-(x6\6!).....+(x2n\2n!)((-1)n+1) 求COSX C语言 。求解 。先谢谢 。

Answer 1

#include #include void main() { float sum=1,a=1; int x,n=2; scanf("%d",&x); while(fabs(a)>=0.00001) { a=-a*(float)x*x/((n-1)*n); n=n+2; sum=sum+a; } printf ("cos(%d)=%f\n",x,sum); }