diff --git a/src/Jitter2/LinearMath/JMatrix.cs b/src/Jitter2/LinearMath/JMatrix.cs
index 53de7b28..03d0711d 100644
--- a/src/Jitter2/LinearMath/JMatrix.cs
+++ b/src/Jitter2/LinearMath/JMatrix.cs
@@ -191,8 +191,8 @@ public static JMatrix CreateRotationX(Real radians)
     {
         JMatrix result = Identity;
 
-        Real c = (Real)Math.Cos(radians);
-        Real s = (Real)Math.Sin(radians);
+        Real c = MathR.Cos(radians);
+        Real s = MathR.Sin(radians);
 
         // [  1  0  0  ]
         // [  0  c -s  ]
@@ -209,8 +209,8 @@ public static JMatrix CreateRotationY(Real radians)
     {
         JMatrix result = Identity;
 
-        Real c = (Real)Math.Cos(radians);
-        Real s = (Real)Math.Sin(radians);
+        Real c = MathR.Cos(radians);
+        Real s = MathR.Sin(radians);
 
         // [  c  0  s  ]
         // [  0  1  0  ]
@@ -227,8 +227,8 @@ public static JMatrix CreateRotationZ(Real radians)
     {
         JMatrix result = Identity;
 
-        Real c = (Real)Math.Cos(radians);
-        Real s = (Real)Math.Sin(radians);
+        Real c = MathR.Cos(radians);
+        Real s = MathR.Sin(radians);
 
         // [  c -s  0  ]
         // [  s  c  0  ]
diff --git a/src/Jitter2/World.Step.cs b/src/Jitter2/World.Step.cs
index 432613ac..09d7190e 100644
--- a/src/Jitter2/World.Step.cs
+++ b/src/Jitter2/World.Step.cs
@@ -613,10 +613,10 @@ private void IntegrateCallback(Parallel.Batch batch)
             else
             {
                 // sync(fAngle) = sin(c*fAngle)/t
-                JVector.Multiply(avel, (Real)Math.Sin((Real)0.5 * angle * substep_dt) / angle, out axis);
+                JVector.Multiply(avel, MathR.Sin((Real)0.5 * angle * substep_dt) / angle, out axis);
             }
 
-            JQuaternion dorn = new(axis.X, axis.Y, axis.Z, (Real)Math.Cos(angle * substep_dt * (Real)0.5));
+            JQuaternion dorn = new(axis.X, axis.Y, axis.Z, MathR.Cos(angle * substep_dt * (Real)0.5));
             //JQuaternion.CreateFromMatrix(rigidBody.Orientation, out JQuaternion ornA);
             JQuaternion ornA = rigidBody.Orientation;