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OpenStudy (geometry_hater):
In right triangle ABC, Angle B = 21deg, BC = 12, Find BA. Round to nearest whole number.
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OpenStudy (geometry_hater):
hero (hero):
cos(21) = adj/hyp
hero (hero):
cos(21) = 12/x
OpenStudy (anonymous):
Cosine (21) = BC/AB => AB = 12/Cos(21).
hero (hero):
x = 12/cos(21)
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hero (hero):
x = AB
OpenStudy (geometry_hater):
thanks
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