Va rog ajutatima am nevoie pana diseara
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Răspuns:
Explicație pas cu pas:
8. cosB = AB/BC = AB/50
0,28*50 = AB
AB = 14
AC^2 = 50^2 + 14^2 = 2500+196 = 2304
AC = V2304 = 48
9. ctgC = AB/AC = AB/4 =2/5
AB = 4*2/5 = 8/5
BC^2 = 16 + 64/25 = (25*16 +64)/25=464/25
BC = 4V29/5