Mathematics, 01.09.2019 11:00 daverius3153
In triangle abc, a = 9, c = 5, and b = 120°. find b2.
Answers: 1
= 
+ 
-2ac cosФ 
+ 
-2(9)(5) cos 120
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In triangle abc, a = 9, c = 5, and b = 120°. find b2....
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