Answers Mathematics III PretestQuestion 5

5

lesson pretestMultiple Choice

Pretest

Question 5 • Mathematics III

Which equation correctly uses the law of cosines to solve for the missing side length of △PQR ?

Answer

A

6 squared is equal to p squared plus 8 squared minus 2 p 8 cosine open paren 39 degrees close paren

B

p squared is equal to 6 squared plus 6 squared minus 2 6 6 cosine open paren 39 degrees close paren

C

8 squared is equal to 6 squared plus p squared minus 2 6 p cosine open paren 39 degrees close paren

D

p squared is equal to 6 squared plus 8 squared minus 2 6 8 cosine open paren 39 degrees close paren

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