Question

Find the component form of if a if (i) It lies in YZ plane and makes 60º with positive Y-axis and vector |a| = 4

Answer 1

Let α, β, γ be the direction angles of \(\overline{a}\)

Since \(\overline{a}\) lies in YZ-plane, it is perpendicular to X-axis

∴ α = 90°

It is given that β = 60°

Unit vector along a is given by