c=2RsinC
c=2*2sin60
=2*2根号3/2
=2根号3
设a/b=3/4=K
则,a=3K,b=4K
由余弦定理得:
c^2=a^2+b^2-2abconB
即,(3K)^2+(4K))^2-2*3K*4Kcon60=(2根号3)^2
9K^2+16k^2-12K^=12
13K^2=12
K^2=12/13
K=2(根号39)/13
故,a=6(根号39)/13
b=8(根号39)/13
c=2RsinC
c=2*2sin60
=2*2根号3/2
=2根号3
设a/b=3/4=K
则,a=3K,b=4K
由余弦定理得:
c^2=a^2+b^2-2abconB
即,(3K)^2+(4K))^2-2*3K*4Kcon60=(2根号3)^2
9K^2+16k^2-12K^=12
13K^2=12
K^2=12/13
K=2(根号39)/13
故,a=6(根号39)/13
b=8(根号39)/13