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avatar+1286 

A 25-foot ladder is leaning against the side of a house. The top of the ladder is 20 feet above the ground. To the nearest degree, find the angle of elevation between the ground and the ladder.

 

A) 37°

B) 39°

C) 51°

D) 53°

E) 72°

 Nov 6, 2019
 #1
avatar+105411 
+1

Evaluate

 

arcsin  (20/25)

 

Make sure your calculator is in DEGREE mode....

 

 

 

cool cool cool

 Nov 6, 2019
 #2
avatar+1286 
+1

first divide opposite by the hypotenuse or 20 / 25

 

then multiply the answer by sine^-1

 

so your answer is D:

20/25 = 0.8

sine^-1 (0.8) = 53 and some change

macabresubwoofer  Nov 6, 2019

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