[ L srN (θ ) ] =[ A ] −1 [ L sr ( θ ) ] [ A ] [ L srN ( θ ) ] = M sr 2 3 [ 1 1 1 2 −1 −1 −1 2 −1 ] [ cosθ cos ( θ + 2 π 3 ) cos ( θ + 4 π 3 ) cos ( θ + 4 π 3 ) cosθ cos ( θ + 2 π 3 ) cos ( θ + 2 π 3 ) cos ( θ + 4 π 3 ) cosθ ] [ 1 1 0 1 0 1 1 −1 −1 ] [ L srN ( θ ) ] = M sr 2 3 [ a b c d e f g h i ] [ 1 1 0 1 0 1 1 −1 −1 ] a =cosθ + cos ( θ + 4 π 3 ) +cos ( θ + 2 π 3 ) a =cosθ − 1 2 cos θ + 1 2 √ 3sin θ− 1 2 cos θ − 1 2 √ 3sin θ =0 a =b =c =0 d =2 cosθ −cos ( θ + 4 π 3 ) −cos ( θ + 2 π 3 ) d =2 cosθ + 1 2 cos θ− 1 2 √ 3sin θ + 1 2 cos θ + 1 2 √ 3sin θ=3 cosθ e =2 cos ( θ + 2 π 3 ) −cosθ −cos ( θ + 4 π 3 ) e = −1 2 cos θ− 1 2 √ 3sin θ− 1 2 cos θ − 1 2 √ 3sin θ −cosθ + 1 2 cos θ − 1 2 √ 3sin θ = −3 2 cosθ − 3 2 √ 3 sinθ f =2 cos ( θ + 4 π 3 ) −cos ( θ + 2 π 3 ) −cosθ f = −1 2 cos θ + 1 2 √ 3sin θ − 1 2 cos θ + 1 2 √ 3sin θ + 1 2 cos θ + 1 2 √ 3 si n θ −cosθ = −3 2 cosθ + 3 2 √ 3 sinθ
