Ответы и объяснения

2013-12-17T14:56:48+00:00
Ctg35 = 1,42814800674
Tg35 = 0,70020753821
Tg20 = 0,36397023426
1,42814800674 - 0,70020753821 = 0,72794046853
2 x 0,36397023426 = 0,72794046852
0,72794046853 - 0,72794046852 = 0.00000000001 = 0.1