SOLUTION: Find the missing parts using the Cosine Law. a = ? A = 40� b = 8 B = ? c = 10 C

Question 829942: Find the missing parts using the Cosine Law.
a = ? A = 40�
b = 8 B = ?
c = 10 C = ?

Answer by math-vortex(648) (Show Source): You can put this solution on YOUR website!

Hi, there--

THE PROBLEM:
Find the missing parts using the Cosine Law:
a =   ?     A =  40�            
b =   8    B =   ?             
c =   10  C =   ?    

A SOLUTION:
The Cosine Rule can be written in three forms:





Use the first form to solve for a






Use the second form to solve for angle B.






Use the third form to solve for angle C.







a = 6.4  A =  40�            
b = 8    B =   52.8�             
c = 10  C =   87.0�    

These values are approximate, rounded to the tenths place.

Hope this helps! Feel free to email if you have any questions about the solution.

Good luck with your math,

Mrs. F
math.in.the.vortex@gmail.com

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