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#javob_algo_CPP_080 Obunachilarimizdan..! #include using n | Kʜ | DASTURLASH !!!

#javob_algo_CPP_080
Obunachilarimizdan
..!

#include

using namespace std;

int main()
{
int a;
double s=0,x;
cin>>a;
for( x=0; x<=10; x+=0.5)
{
s=s+a*cos(x)-sin(x*x);
}
printf("%.2f",s);
return 0;
}


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