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4 years ago

With reference to the diagram, what is cosA?

Mathematics

2 answers:

erica [24]4 years ago

8 0

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

ICE Princess25 [194]4 years ago

5 0

Hello there.

With reference to the diagram, what is cosA?

B.0.447

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