From a point on the ground 144 ft. from the base of a building, the angle of elevation to the top of the building is 23.5°. How tall is the building?
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how level is the ground?
it's trig so I am guessing a level plane which would mean it has a 90° angle at C.
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then tangent helps
tan(t) = h/d
d tan(t) = h
Make a triangle out of the problem. Your horizontal leg is 144ft. Your vertical leg will be x because that is what you want to find. Your angle will be in between your horizontal leg and hypotenuse.
Now it is time to pick a trig function that will answer your question...
Tangent is opp/adj so it will incorporate what you need.
Your equation is now tan23.5 = x/144. Now solve for x.
.4348 = x/144