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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

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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2 votes
With reference to the diagram, what is cosA?

A.0.250
B.0.447
C.0.558
D.0.894
E. 1

With reference to the diagram, what is cosA? A.0.250 B.0.447 C.0.558 D.0.894 E. 1-example-1
User Lukas Knuth
by
7.9k points

2 Answers

3 votes
Hello there.

With reference to the diagram, what is cosA?

B.0.447
User Zensar
by
8.2k points
7 votes
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
User Rafik BELDI
by
7.7k points
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