# How do you find the inner product and state whether the vectors are perpendicular given #<7,-2,4>*<3,8,1>#?

##### 1 Answer

Jul 11, 2016

#### Answer:

Dot product = 9. Vectors are not orthogonal.

#### Explanation:

So, in

For orthogonality, think about the other definition of the dot product:

If the vectors are orthogonal,