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#include?<stdio.h>
#include?<math.h>
int?main()
{???int?sign,n;
????double?x,sum,term;
????printf("ÊäÈëx:";
scanf("%lf",&x);
n=0;sign=1;
term=x;sum=0;
????while(fabs(term)>=1e-6)?
????{???sum=sum+sign*term;
????????n++;?
????????sign=-sign;?
????????term=term*x*x/((2?*?n?+?1)?*?(2?*?n));????
?????}?????????
????printf("sin(%10.8f)=%10.8f\n",x,sum);??
????return?0;
}
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