dd= didi i=1 Equation 1 where d is the vector of the distance between the angle point and the top point of the inclined plan d, is the vector of the distance between the angle point and the bottom point of the plane, and did, i represents the x and y components of each distance. Using this equation, we can further i=1 simplify it to eventually get Equation 2, d, d Equation 2 0= cos