jetblackcap jetblackcap

06-05-2019
Mathematics

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Аноним Аноним

06-05-2019

Answer:

b = 6√3.

Step-by-step explanation:

Use trigonometry.

cos 30 = adjacent side / hypotenuse = b / 12

√3 / 2 = b / 12

2b = 12√3

b = 6√3 answer.

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