Răspunsuri

2014-05-13T15:02:37+03:00
Sin.  = cat.op./ ip.
ip.(AC) : AC^2 = AB^2 + BC^2 = 3^2 + 4^2 ⇒ AC^2 = 25 ⇒ AC = √25 = 5
sin. BCA = 3/5

tg. ACB = cat. op. / cat. al. = 3/4