#include <iostream>
#include <fstream>
#include <string>
#include <TLegend.h>
#include <TMath.h>


using namespace std;

#include <TCanvas.h>
#include <TH1.h>
#include <TF1.h>
#include <TFile.h>
#include <TTree.h>
#include <TChain.h>
#include <TNtuple.h>
#include <TLegend.h>
  


  double zed(double* s, double *p){ 
 
  double ess = s[0] ;
  double dv =  p[0];
  
   return sin(ess)-dv;                               // function you wish to invert minus dummy variable

}

double root_int(double* dummy_variable, double* p) {
	
    double dv = dummy_variable[0] ;    // dummy variable
    double B =  p[0];
	
	TF1 small_z("zed", zed, 0.0, 0.7, 1);   // numerator function
    small_z.SetParameter(0,dv); //  
    return B*small_z.GetX(0,0,0.7) ;                  // y of inverted function
    
		}
		
int main() {
	
    double B = 1 ;  // constant
    
	
	TF1* alpha= new TF1("alpha", root_int, 0., 0.7, 1);   // numerator function
    alpha -> SetParameter(0, B); // Set y0, mu, R, E0 
    alpha-> Draw();
    
    return 0;  
		}