Guided Example #2 - Vectors

Guided Example

Find the dot product of the vectors P and Q given that the angle between the two vectors is 45° and

${\displaystyle \left|P\right|=25}$ units and ${\displaystyle \left|Q\right|=4}$ units

a. ${\displaystyle 50}$
b. $50\sqrt 2$
c. $50\sqrt 3$
d. None of the above

 

The correct answer is B. To see why, view each of the steps below.