Vectors C4

Vectors C4

1. If 2 vectors are parallel then A.B = 0.

   • A.B = SCALAR PRODUCT 

2. A.B is the scalar product ( )x( ) added together

3. AB = b-a

   • a and b are the POSITION VECTORS (OA) and (OB)

4. To find length of vector = √ i² +j² +k²

5. COS θ = A.B ⁄ |A| |B|

   • The lines must be going the same way

6. A vector equation of a straight line is R= (a ) + λ ( b)

   • B IS DIRECTION
   • A IS ONE OF POINTS (POSITION)