# What is the angle between #<<-7,5,-9>> # and #<<-1,-2,1>>#?

##### 1 Answer

Feb 27, 2016

113.17 deg, nearly

#### Explanation:

The angle between the vectors (x, y, z) and (u, v, w) is

arc cos { (xu +yv + zw) / (

Here, the angle is arc cos (