Cross product

• Cross Product and the Right-Hand Rule: What Is the Intuition?
  The cross product points normal to the two input vectors, has magnitude equal to their parallelogram’s area, and uses a right-handed orientation to set its sign.
• How to Differentiate the Cross Product of Vector Functions
  Differentiate a cross product of vector-valued functions with the product rule: u' × v + u × v', with a worked component-by-component example.