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Please someone help me with this its due in 2 hours

Please someone help me with this its due in 2 hours-example-1
User Wubao Li
by
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1 Answer

4 votes

Answer:

Explanation:

I don't know what you want to find but

CB ^2 = AC^2 + AB^2 -2AC.AB.Cos(BAC) Cosine Rule

CB^2 = 9 +64 - 2.3.8.Cos(40)

CB ~ 6

User Pradheep
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7.9k points