Răspuns:
22.
cos30°=AD/AB=
[tex] \frac{ \sqrt{3} }{2} \frac{ad}{8 \sqrt{3} } \\ = > \\ 8 \sqrt{3} \times \sqrt{3} \div 2 = 12[/tex]
daca m DAB 30 atunci rezulta ma casura lui b e 60
cos B=cos 60=Ab/CB=8 radical 3/CB=1/2=16 radical 3
24. imagine 2
25 im 3
