1)S=a*b*siny/2 |*2
a*b*siny=2S |: ab
2S
siny=
ab
2)a/sina=b/sinb
b*sina a*sinb b*sina
a= sina= sinb=
sinb sina a
1)S=a*b*siny/2 |*2
a*b*siny=2S |: ab
2S
siny=
ab
2)a/sina=b/sinb
b*sina a*sinb b*sina
a= sina= sinb=
sinb sina a