diff --git a/apps/shared/cartesian_function.cpp b/apps/shared/cartesian_function.cpp
index a16c95141..1bb128fc3 100644
--- a/apps/shared/cartesian_function.cpp
+++ b/apps/shared/cartesian_function.cpp
@@ -133,7 +133,8 @@ Poincare::Coordinate2D<T> CartesianFunction::privateEvaluateXYAtParameter(T t, P
   } else {
     assert(angleUnit == Preferences::AngleUnit::Radian);
   }
-  return Coordinate2D<T>(x1x2.x2() * std::cos(x1x2.x1()*factor), x1x2.x2() * std::sin(x1x2.x1()*factor));
+  const float angle = x1x2.x1()*factor;
+  return Coordinate2D<T>(x1x2.x2() * std::cos(angle), x1x2.x2() * std::sin(angle));
 }
 
 bool CartesianFunction::displayDerivative() const {