Complete the angle formula

Exercise and reference answers

Missing parts

1. Answer

   cos θ

   Choices

   1. cos θ
   2. sin θ
   3. tan θ

2. Answer

   |a||b|

   Choices

   1. |a||b|
   2. |a| + |b|
   3. a · b

Complete the statement

The scalar product is defined as |a||b| times {0}. Rearranged, the angle between two vectors satisfies cos θ = (a · b) divided by {1}.

Explanation