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Gekata [30.6K]
3 years ago
11

15 POINTS!! Please help me with this math problem quick. Thank you so much

Mathematics
1 answer:
lilavasa [31]3 years ago
5 0

Answer:

1.71

Step-by-step explanation:

by using definition of cos

BC=BA\times \cos{70°}=5\cos{70°}=1.71

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