Răspuns:
Explicație pas cu pas:
AB AC BC sinB cosB tg B ctg B sin C cosC tg C ctg C
4 4√3 8 1/2 √3/2 √3/3 √3 √3/2 1/2 √3 √3/3
12 5 13 5/13 12/13 5/12 12/5 12/13 5/13 12/5 5/12
3 4 5 4/5 3/5 4/3 3/4 3/5 4/5 3/4 4/3
6 8 10 4/5 3/5 4/3 3/4 3/5 4/5 3/4 4/3