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OpenStudy (anonymous):
In right triangle ABC, Angle B = 21deg, BC = 12, Find BA. Round to nearest whole number. Answer 25 ft. 11 ft. 13 ft. 15 ft.
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OpenStudy (anonymous):
OpenStudy (id21):
cos21=12/BA BA=12/cos 21
OpenStudy (anonymous):
cos21=12/x 0.9336x=12 x=12/0.9336 x=13ft
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