... 0,83 1 . 1 1 1 3αγϕtgtg+= = 43 ,1. 4, 21 4,2+ = 0,23Cu 1 = C’.cosγ 1 = 7.cos700 = 2,39U 1 .Cu 1 = tgα 1 .7.sinγ 1 = 1, 43.7.0,94 = 9,4⇒U 1 = Cu 1 + U 1 .Cu 1 = 2,39 + 9,4 = 11 ,79=2 1 UU ... γ 1 =700, γ2 =80Vậy ta có: tgγ 1 = 2,4, tgγ2 = 0 ,14 , tgα 1 = 1, 43, tgα2 = 1, 43. 1 . 1 1 1 1αγγϕtgtgtg+= = 43 ,1. 4, 21 4,2+ = 0,542.2 1 12αγϕtgtg+= = 43 ,1. 14, 01 4,2+ ... 11 ,79=2 1 UU = 1 2dd 1, 8 ⇒ U2 = 1, 8 .11 ,79 = 21, 22Hm = ( )32 12 22 ϕϕγUU − = ( ) ( )[ ]23,0.79 ,11 83,0.222, 21. 2 ,1 22− = 410 ,2với H = 204,84⇒mHH=η= 2, 410 84,204...