A point mass is subjected to two simultaneous sinusoidal displacements in x-direction, x1(t) = Asinωt and x2 (t) =Asin(ωt + 3/2π ). Adding a third sinusoidal displacement x3 (t) = B sin(ωt+ϕ) brings the mass to a complete rest. The values of B and ϕ are