Calculus Vector

Question

Let a=<0,−4,3> and b=<−1,−3,2>. Find the angle between the vector (in radians) rounded to 4 decimal places.

Answer 1

cosθ = (a•b) / [ llall llbll] = 18 / [5√14]

θ = Cos^-1(18 / 5√14) ≈ 0.276 radians