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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