k =tg (45-φ/2) = k =tg (45+φ/2) =: z 3 zv 3 2 doz 3 sk sp 2 b 3 v 2 | PDF

k =tg (45-φ/2) = k =tg (45+φ/2) =: z 3 zv 3 2 doz 3 sk sp 2 b 3 v 2 | PDF