Posted by Anonymous on Wednesday, January 26, 2011 at 9:49pm.
Dr. Black is standing 15 feet away from the street lamp. The lamp is making his shadow 8 feet long. The angle of elevation from the tip of the shadow to the tip of the streetlamp is 50 degrees. How tall is the streetlamp?

Pre Calc  helper, Wednesday, January 26, 2011 at 10:13pm
If I am understanding this picture,
a right triangle is formed with angle A = 50 degrees and side b = 23 (15 + 8).
You need the length of a, which is the streetlamp.
tan A = opp/adj = a/b = a/23
tan 50 = a/23
1.19 = a/23
Solve for a, for your answer

Pre Calc  Anonymous, Thursday, February 17, 2011 at 9:56pm
27.37

Pre Calc  Anonymous, Tuesday, September 1, 2015 at 2:24pm
20
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