public override Node Clone()
{
Node newNode = new NodeCos();
Node newNode1 = node1.Clone();
newNode.AddNode1(newNode1);
return(newNode);
}
public override Node GetDerivative() //O = original, D = derivative
{
Node node1O = node1.Clone();
Node node1D = node1.GetDerivative();
Node cosnode = new NodeCos();
Node timesnode = new NodeTimes();
timesnode.AddNode1(cosnode);
timesnode.AddNode2(node1D);
cosnode.AddNode1(node1O);
return(timesnode);
}