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Answer:
(a) MN/NP
Step-by-step explanation:
The mnemonic SOH CAH TOA reminds you that the cosine relation is ...
Cos = Adjacent/Hypotenuse
The triangle similarity statement tells you angle Q is congruent to angle N. The side adjacent to angle N is side MN, and the hypotenuse of triangle NPM is NP. Then the desired ratio is ...
cos Q = MN/NP . . . . . . matches upper left choice
