alyssaxsanchez
04.08.2019 •
Mathematics
Which pair of ratios can from a true proportion a.7/4,21/12 b.6/3, 5/6 c.7/10, 6/7 d.3/5, 7/12
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Ответ:
Ответ:
cos B = AB / BC
cos B = 3 / [ 3 * sqrt(2) ]
cos B = 1/sqrt(2)
cos B = sqrt(2)/2
B = arccos[ sqrt(2)/2 ]
B = 45° < this is the answer.
I hope this helps. =)