1 is in each sector θ1 uA1 uB1 uC1 0≤θ1 <
π
3 32Umcos θ1 - π ( )
6 3
2 Umsin θ1 - π ( )
6 - 32Umcos θ1 - π ( )
6 π
3 ≤θ1 <
2π
3 3
2 Umcos( θ1) 32Umsin( θ1) - 32Umsin( θ1) 2π
π 32Umcos θ1 + π ( )........