diff --git a/main/src/com/polites/android/MathUtils.java b/main/src/com/polites/android/MathUtils.java
index a0ad828..2898644 100644
--- a/main/src/com/polites/android/MathUtils.java
+++ b/main/src/com/polites/android/MathUtils.java
@@ -24,19 +24,19 @@ public class MathUtils {
 	public static float distance(MotionEvent event) {
 		float x = event.getX(0) - event.getX(1);
 		float y = event.getY(0) - event.getY(1);
-		return FloatMath.sqrt(x * x + y * y);
+		return (float)Math.sqrt(x * x + y * y);
 	}
 	
 	public static float distance(PointF p1, PointF p2) {
 		float x = p1.x - p2.x;
 		float y = p1.y - p2.y;
-		return FloatMath.sqrt(x * x + y * y);
+		return (float)Math.sqrt(x * x + y * y);
 	}
 	
 	public static float distance(float x1, float y1, float x2, float y2) {
 		float x = x1 - x2;
 		float y = y1 - y2;
-		return FloatMath.sqrt(x * x + y * y);
+		return (float)Math.sqrt(x * x + y * y);
 	}
 
 	public static void midpoint(MotionEvent event, PointF point) {
@@ -62,8 +62,8 @@ public void rotate(PointF p1, PointF p2, float angle) {
 		float py = p1.y;
 		float ox = p2.x;
 		float oy = p2.y;
-		p1.x = (FloatMath.cos(angle) * (px-ox) - FloatMath.sin(angle) * (py-oy) + ox);
-		p1.y = (FloatMath.sin(angle) * (px-ox) + FloatMath.cos(angle) * (py-oy) + oy);
+		p1.x = ((float)Math.cos(angle) * (px-ox) - (float)Math.sin(angle) * (py-oy) + ox);
+		p1.y = ((float)Math.sin(angle) * (px-ox) + (float)Math.cos(angle) * (py-oy) + oy);
 	}
 	
 	public static float angle(PointF p1, PointF p2) {
diff --git a/main/src/com/polites/android/VectorF.java b/main/src/com/polites/android/VectorF.java
index ce23663..8c41ea7 100644
--- a/main/src/com/polites/android/VectorF.java
+++ b/main/src/com/polites/android/VectorF.java
@@ -28,8 +28,8 @@ public class VectorF {
 	public final PointF end = new PointF();
 	
 	public void calculateEndPoint() {
-		end.x = FloatMath.cos(angle) * length + start.x;
-		end.y = FloatMath.sin(angle) * length + start.y;
+		end.x = (float)Math.cos(angle) * length + start.x;
+		end.y = (float)Math.sin(angle) * length + start.y;
 	}
 	
 	public void setStart(PointF p) {