Question

Rezolvati triungul ABC-dr.in A,stiind ca:
a) AC=6cm,m(unghiuluiB)=30
b) BC=5√2cm,B≡C

Answer 1

a).m(C)=180-90-30=60 grade
sin 30 de grade=AC/BC
1/2=6/BC
BC=(2*6)/1
BC=12 cm
ΔBAC⇒AB²=BC²-AC²=12²-6²=144-36=108
AB=√108
AB=6√3 cm
b).m(A)=m(B)=180-90=90:2=45 grade
sinB=AC/BC
sin 45=AC/5√2
√2/2=AC/5√2
AC=√2*5√2/2
AC=10/2
AC=5cm
AC=AB=5 cm