sinB : b= sinA: a
sinA=√3 /2
A=60°
A+B+C=180°
C=75°
sinC:c =sinB: b
c=(√3+√6)/2
不懂,请追问,祝愉快
略解,字限
a/sinA=b/sinB=c/sinC
即√3/sinA=√2/sin45°=√2/(√2/2)=2
sinA=√3/2
A=60°或120°
故C=75°或15°
sinC=sin(45°±30°)=sin45cos30±cos45sin30
又c/sinC=b/sinB=2
c=2*sinC=(√6±√2)/2
sinB /b=sinA /a
1/2^(1/2) / 2^(1/2) = sinA /3^(1/2)
sinA = 3^(1/2) / 2
A = 60 度
C = 75 度
c/sinC = b/sinB = 2
c = 2sin75度 =
A=60度 C=75度 c=(根号6+根号2)/2
要详细的过程 可追问 谢
当A=60°时, C=75° c==√6/2+√2/2
当A=120°时 ,C=15° c==√6/2-√2/2