Wednesday 18 November 2015

`A = 120^@, a = 25, b = 24` Use the law of sines to solve (if possible) the triangle. If two solutions exist, find both. Round your answer...

Given: `A=120^@, a=25, b=24`


The Law of Sines:   `a/sin(A)=b/sin(B)=c/sin(C)`


`25/sin(120)=24/sin(B)=c/sin(C)`



`sin(B)=[24sin(120)]/25=.8313`


`B=arcsin(.8313)`


` ` `B=56.24`



`C=180-120-56.24`


`C=3.76`



`25/sin(120)=c/sin(3.76)`


`c=[25sin(3.76)]/sin(120)`


`c=1.89` 



Given: `A=120^@, a=25, b=24`


The Law of Sines:   `a/sin(A)=b/sin(B)=c/sin(C)`


`25/sin(120)=24/sin(B)=c/sin(C)`



`sin(B)=[24sin(120)]/25=.8313`


`B=arcsin(.8313)`


` ` `B=56.24`



`C=180-120-56.24`


`C=3.76`



`25/sin(120)=c/sin(3.76)`


`c=[25sin(3.76)]/sin(120)`


`c=1.89` 



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