Question

vector calculas

Answer 1

How do you think you will calculate this?

Answer 2

u = (4,1,-4), v = (-3,-3,-6)

What vector "operation" uses a cosine?

Answer 3

still there?

Answer 4

I'm out here then. But here's a hint: think about the dot product.

Answer 5

u.v=uv cos(theta)
theta=arc cos[u.v/uv]