Solve
![(Bx^2 + By^2 + Dv^2) DvH2^2 - (Dv^2 + Dv2^2) Hight^2 - 2 Dv DvH2^2 (By Cos[θ] + Bx Sin[θ]) == 0](../HTMLFiles/index_178.gif){kind=small}
![Dv Dv2 - (Bx Dv + By Dv2) Cos[θ] + (By Dv - Bx Dv2) Sin[θ] == 0](../HTMLFiles/index_179.gif){kind=small}
