Question

Evaluate the expression:

v ⋅ w

Given the vectors:

r = <5, -5, -2>;
v = <2, -8, -8>;
w = <-2, 6, -5>

Answer 1

Haven't done vectors in a while.. >.<

Answer 2

noooo :c

Answer 3

v=2i-8j-8k
w=-2i+6j-5k

since v.w=vwcostheta. Therefore for cos theta = 90 it will be zero. So multiply the coefficients of the corresponding directions.

we have v.w = -4-48+40=-4-8=-12.. So v dot w = -12...

Answer 4

## sorry for theta = 90 cos theta is 0

Answer 5

theta is the angle between the direction axis...