Question

Let u and v be vectors. Find the scalars and vectors defined below. Note that these formulas only depend on u, the unit vector in the direction of v. The component of u along v is:
a) |u| ⋅ cos(θ)
b) |u| ⋅ sin(θ)
c) |v| ⋅ cos(θ)
d) |v| ⋅ sin(θ)