△ABC中,若b/c=3/5,则(sinB+2sinC)/sinC=
问题描述:
△ABC中,若b/c=3/5,则(sinB+2sinC)/sinC=
答
(sinB+2sinC)/sinC
=sinB/sinC+2sinC/sinC
=b/c+2
=13/5
答
b/c=3/5,sinB/sinC=3/5
sinB+2sinC)/sinC=(3+10)/5=13/5