(1)因为在△中,所以sinA=√(1-16/25)=3/5,因为∠B=60度,所以sinB=√3/2,cosB=1/2,所以sin(A+B)=sinC=(4√3+3)/10
(2)根据正弦定理得:a=sinA*b/sinB=6/5
因为S=absinC/2=(36+9√3)/50
(1)因为在△中,所以sinA=√(1-16/25)=3/5,因为∠B=60度,所以sinB=√3/2,cosB=1/2,所以sin(A+B)=sinC=(4√3+3)/10
(2)根据正弦定理得:a=sinA*b/sinB=6/5
因为S=absinC/2=(36+9√3)/50