Dot Products of Vectors

Question 1

What is the dot product/ scalar product?

Answer 1

A measure of how close together two vectors are

Question 2

How do you calculate the dot product of two vectors?

Answer 2

1. (X1 x X2) + (Y1 x Y2) = A
2. Do Pythagoras on vector 1 and vector 2 separately = B and C
3. use arccos (cos^-1)
   θ = cos^-1 (A/(B x C))