1. The problem statement, all variables and given/known data The problem along with its solution is attached as Problem 1-2.jpg. 2. Relevant equations Norm of a vector. 3. The attempt at a solution Starting from the final answer of the solution, sqrt((-0.625)^2 + (0.333)^2) == 0.708176532 != 1. Did the book do something wrong? I ask because, a unit vector should have a magnitude of 1. Also, sin(ϕ) = sin(60°) should equal 0.866025404 rather than 0.883 and cos(ϕ) = cos(60°) should equal 0.5 instead of 0.470. Am I missing something here? Any input would be greatly appreciated! Thanks in advance!