SOLUTION: This is a triganometry promblem using Law of Cosines.Given a triangle with b=4, c=7, and A=50 degrees, what is the lenght of a? Round answer two decimal places. Thanks for your he

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Question 188645: This is a triganometry promblem using Law of Cosines.Given a triangle with b=4, c=7, and A=50 degrees, what is the lenght of a? Round answer two decimal places.
Thanks for your help!!!!
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


Applicable form of the Law of Cosines:



or, more to the point for this problem:




Substitute your values:



Get out your calculator and have at it. Remember to round to the nearest hundredth.

John