diff --git a/Source/Engine/Core/Collections/Dictionary.h b/Source/Engine/Core/Collections/Dictionary.h
index c354aec01..c1e36e5dc 100644
--- a/Source/Engine/Core/Collections/Dictionary.h
+++ b/Source/Engine/Core/Collections/Dictionary.h
@@ -530,7 +530,7 @@ public:
             for (int32 i = 0; i < oldSize; i++)
             {
                 if (oldData[i].IsOccupied())
-                    Add(oldData[i].Key, oldData[i].Value);
+                    Add(oldData[i].Key, MoveTemp(oldData[i].Value));
             }
         }
         if (oldElementsCount != 0)
diff --git a/Source/Engine/Core/Delegate.h b/Source/Engine/Core/Delegate.h
index bba43eb16..9269fec9d 100644
--- a/Source/Engine/Core/Delegate.h
+++ b/Source/Engine/Core/Delegate.h
@@ -89,6 +89,20 @@ public:
         _lambda = nullptr;
     }
 
+    /// <summary>
+    /// Initializes a new instance of the <see cref="Function"/> class.
+    /// </summary>
+    template<typename T>
+    Function(const T& lambda)
+    {
+        _lambda = (Lambda*)Allocator::Allocate(sizeof(Lambda) + sizeof(T));
+        _lambda->Refs = 1;
+        _lambda->Dtor = [](void* callee) -> void { static_cast<T*>(callee)->~T(); };
+        _function = [](void* callee, Params ... params) -> ReturnType { return (*static_cast<T*>(callee))(Forward<Params>(params)...); };
+        _callee = (byte*)_lambda + sizeof(Lambda);
+        new(_callee) T(lambda);
+    }
+
     Function(const Function& other)
         : _callee(other._callee)
         , _function(other._function)
diff --git a/Source/Engine/Core/Math/Math.cpp b/Source/Engine/Core/Math/Math.cpp
index d0642d7ca..0e60a3248 100644
--- a/Source/Engine/Core/Math/Math.cpp
+++ b/Source/Engine/Core/Math/Math.cpp
@@ -1,6 +1,7 @@
 // Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
 
 #include "Math.h"
+#include "Mathd.h"
 #include "Vector3.h"
 
 void Math::SinCos(float angle, float& sine, float& cosine)
@@ -9,6 +10,12 @@ void Math::SinCos(float angle, float& sine, float& cosine)
     cosine = Math::Cos(angle);
 }
 
+void Math::SinCos(double angle, double& sine, double& cosine)
+{
+    sine = Math::Sin(angle);
+    cosine = Math::Cos(angle);
+}
+
 uint32 Math::FloorLog2(uint32 value)
 {
     // References:
diff --git a/Source/Engine/Threading/Task.h b/Source/Engine/Threading/Task.h
index 7004c130e..86a34a992 100644
--- a/Source/Engine/Threading/Task.h
+++ b/Source/Engine/Threading/Task.h
@@ -248,6 +248,19 @@ public:
     /// <returns>Task</returns>
     static Task* StartNew(Function<void()>::Signature action, Object* target = nullptr);
 
+    /// <summary>
+    /// Starts the new task.
+    /// </summary>
+    /// <param name="callee">The callee object.</param>
+    /// <returns>Task</returns>
+    template<class T, void(T::* Method)()>
+    static Task* StartNew(T* callee)
+    {
+        Function<void()> action;
+        action.Bind<T, Method>(callee);
+        return StartNew(action, dynamic_cast<Object*>(callee));
+    }
+
     /// <summary>
     /// Starts the new task.
     /// </summary>