contoh program :
#include <iostream>
#include <conio>
#include <math>
panjangSisi(double sisiB,double sisiC,double sudutA);
int main()
{
double a,b,c,hasil;
cout<<"nilai b= ";cin>>b;
cout<<"nilai c= ";cin>>c;
cout<<"sudut alpha= ";cin>>a;
hasil=panjangSisi(b,c,a);
cout<<"Panjang sisi = "<<hasil<<endl;
getch();
}
panjangSisi(double sisiB,double sisiC,double sudutA)
{
double hasil;
hasil=pow(sisiB,2)+pow(sisiC,2)-(2*sisiB*sisiC*cos(sudutA));
return(sqrt(hasil));
}
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