Length of a vector

  • The length of a vector is defined as

The dot product

  • What is the Dot product

    • let and be two vectors in the dot product of is defined as
    • Loosly, the dot product is a measure of how much one vector is “towards the directon” or the otheroq
  • If two vectors dot product is 0 they are orthogonal

    • they are perpendicular
  • EX

    • finding all vectors that are orthoganal to both
      • Need a that

angles between two vectors