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Rasek [7]
3 years ago
14

I think I know how to solve this, but could someone please check my work for me?

Mathematics
1 answer:
Fiesta28 [93]3 years ago
5 0
Answer is :

 cos⁻¹[(-1-4√7)/(√17, √8) = 173.33° ≈ 173°

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Help me with 16,18 and 20
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