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Alexus [3.1K]
2 years ago
14

I don’t know what to do please help

Mathematics
1 answer:
Marrrta [24]2 years ago
4 0

Answer:

cos(A)=√21/5

Step-by-step explanation:

Use the definition of each function as well as the Pythagorean Theorem.

Hope it helps :>

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Answer:

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A = {1, 2, 3, 4, 5} and B = {2, 4}.

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