1. The problem statement, all variables and given/known data The line intersects a plane at an angle alpha=2pi/3. The line is defined by r=μn, and the plane by r.m=0, with n and m unit vectors. Calculate the shortest distance from the plane to the point on the line with μ=2. 2. Relevant equations ? 3. The attempt at a solution I want to find the value of μ at the point of intersection. Then it will be easy to find the distance, as d=(2-μ at intersection)sin(2pi/3). However, I don't know how to find μ. Any hints?