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Home > PC3 > Chapter 11 > Lesson 11.2.1 > Problem 11-94

11-94.

Given vector  and vector , what must the value of a be in order for the angle between the two vectors to equal ?

Dot Product

Given two vectors and , the dot product (also called inner product or scalar product) is:

 

Example: If and , then .

Another formula for the dot product is:

, where θ is the angle between  and