△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=

(sinB+2sinC)/sinC
=sinB/sinC+2sinC/sinC
=b/c+2
=13/5

b/c=3/5,sinB/sinC=3/5
sinB+2sinC)/sinC=(3+10)/5=13/5