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Re:无聊的数学题,推导如下In Reply To:无聊的数学题,推导如下 Posted by:200730690105 at 2008-09-12 14:21:18 > //公式推导:V2=iR=CR d/dt(Vs*cos(wt)-Vr*cos(wt+b))=Vrcos(wt+b) > // CRw(sin(wt+b)-sin(wt))=Vr*cos(wt+b) > // 令t=0化简得: tan(b)=1/(CRw)-------------(1) > // 令wt+b=0化简得:Vr=CRwVs*sin(b)------------(2) > // 由(1),(2)得: Vr=CRwVs/sqrt(1+(CRw)^2)) > > #include <stdio.h> > #include <math.h> > int main() > { > double vs,r,c,w,vr; > int i,t; > scanf("%lf %lf %lf %d",&vs,&r,&c,&t); > for(i=1;i<=t;i++) > { > scanf("%lf",&w); > vr=c*r*w*vs/sqrt(1+c*r*w*c*r*w); > printf("%.3lf\n",vr); > } > return 0; > } 提交这个提示答案错误,为什么? Followed by: Post your reply here: |
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