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3 years ago

7

What would the answer be??

1 answer:

Liono4ka [1.6K]3 years ago

5 0

Answer:

38°

Step-by-step explanation:

a²=b²+c²-2bc cos A

5²=3²+7²-2(3)(7) cos A

-33 = -42 cos A

A = $cos^{-1}$ (-33/-42)

A = 38°

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