-static const Double_t kPI = TMath::Pi();
-static const Double_t k2PI = 2*kPI;
-static const Double_t kDegrad = kPI/180;
-static const Double_t kRaddeg = 180/kPI;
+static const Double_t k2PI = TMath::TwoPi();
+static const Double_t kDegrad = TMath::DegToRad();
+static const Double_t kRaddeg = TMath::RadToDeg();