SOLUTION: Find the measure of b, given m angle A = 38^o, m angle B = 74^o, and a = 31 A. 19.9 B. 18.3 C. 37.8 D. 48.4

Algebra ->  Trigonometry-basics -> SOLUTION: Find the measure of b, given m angle A = 38^o, m angle B = 74^o, and a = 31 A. 19.9 B. 18.3 C. 37.8 D. 48.4       Log On


   

Question 627303: Find the measure of b, given m angle A = 38^o, m angle B = 74^o, and a = 31
A. 19.9

B. 18.3

C. 37.8

D. 48.4

Found 2 solutions by solver91311, psbhowmick:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


Use the Law of Sines:



For your problem:



Solve for

John

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Answer by psbhowmick(878) About Me  (Show Source):
You can put this solution on YOUR website!
Use Sine rule

a%2Fsin%28A%29+=+b%2Fsin%28B%29
31%2Fsin%2838%29+=+b%2Fsin%2874%29
b=31%2Asin%2874%29%2Fsin%2838%29
b=48.4