SOLUTION: I am trying to use law of cosines, but I keep going wrong somewhere. I know sides c=90in and b=45in and the angle A=30. Please help me fill out the rest of the triangle! Thanks!

Question 954939: I am trying to use law of cosines, but I keep going wrong somewhere. I know sides c=90in and b=45in and the angle A=30. Please help me fill out the rest of the triangle! Thanks!
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
Law Of Cosines, ;

Symmetric Property and substitute given values, ;

Evaluate or compute, and find square root of .

Study the form of the formula carefully, and you should be able to make two other equations.

One of them, .
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