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A 10 ft ladder is placed against a building so that the ladder makes a 78 degree angle with the ground. To the nearest tenth of a foot, at what height does the ladder touch the building?

 Mar 1, 2021
edited by Guest  Mar 1, 2021
 #1
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The 10 ft is the hypotenuse of a right triangle   

     sin 78 = opp / hyp      where opp is the height

     sin 78 = height/10

10 sin 78 = height            (use calculator) 

 Mar 1, 2021

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