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 Nov 23, 2018
 #1
avatar+19707 
0

Cosine = adj/hyp

 Nov 23, 2018
 #2
avatar+52 
+2

Thus, (C) fits the option!

 Nov 23, 2018
 #3
avatar+106515 
+2

We know an angle and the adjacent side to this angle

And we are looking for the hypotenuse [ the side opposite the right angle ]

 

The cosine  = the ratio of the adjacent side to the hypotenuse....so

 

cos (20°) =   54 / x  ⇒ "C"

 

 

cool cool cool

 Nov 23, 2018

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