Vector A = 4 i +4 j + 6 k  have angles α, β, θ with axis x, y, z respectively.   Write magnitude A = ? Calculate α, β, A = (4.4+4.4+6.6)1/2  A = 8.2 α = cos-1 Ax/A = cos-1 4/8.2 = 60.9O β = cos-1 Ay/A = cos-1 4/8.2 = 60.9O θ = cos-1 Az/A = cos-1 6/8.2 = 43.3O cos2 α + cos2 β + cos2 θ =

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