b/sinB=5a/3
a/sinA=b/sinB
a/sinA=5a/3
sinA=3/5 cosA=4/5
bcsinA=3,bc=5
a^2=b^2+c^2-2bc*cosA
b^2+c^2=10
b^2-2bc+c^2=10-2*5
(b-c)^2=0
b=c=√5