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Thank you so much for the help!

 Jul 26, 2020
 #1
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+1

I dont think I should do your homework for you, but I can give you a hint. 

For 1)

Rotationally use the Law of Cosines until you got one of each.

Ex: First set angle B to C, then angle A, and so on.

 

For 2) 

Use the law of cosines (again) to get a quadratic. The larger term is a_2, and the smaller term is a_1. (Further hint, the cosine of 60 is \(\frac{\sqrt3}{2}\))

 

For 3)

Use the law of cosines, where 12 is c, 10 is b, and a is a. 

 
 Jul 26, 2020

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