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With reference to the diagram, what is cosA? A.0.250 B.0.447 C.0.558 D.0.894 E. 1
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With reference to the diagram, what is cosA? A.0.250 B.0.447 C.0.558 D.0.894 E. 1
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Jan 28, 2017
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With reference to the diagram, what is cosA?
A.0.250
B.0.447
C.0.558
D.0.894
E. 1
Mathematics
high-school
Lukas Knuth
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Lukas Knuth
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Hello there.
With reference to the diagram, what is cosA?
B.0.447
Zensar
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Jan 31, 2017
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Zensar
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cos A = Ad / AB
tan 26.57 = AB / 17.89
so AB = 17.89 * tan 26.57 = 8.9469
By pythagoras
Bd = sqrt ( 17.89^2 - 16^2) = 8
AD = sqrt (8.9469^2 - 8^2) = 4.006
cos A = 4.006/ 8.9469 = 0.447
Rafik BELDI
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Feb 1, 2017
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Rafik BELDI
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