- #1
Oliviacarone
- 18
- 1
Homework Statement
Find the cosine of the angle determined by the intersecting lines
m1: (x,y,z) = (-2,1,4)+s(1,-3,4)
m2: (x,y,z) = (-2,1,4)+t(-2,3,2)
s and t are free variables
Homework Equations
a⋅b = length(a)length(b) cosθ
The Attempt at a Solution
I just did this equation using no free variables, since I have no idea how to use them and someone told me to ignore them? So I did
((-2,1,4)⋅(-2,1,4))/(√(-2+1+4))((√(-2+1+4)) = cosθ and solved for θ.