# Trigonometry

posted by
**Alivia**
.

Two points, A and D, are in a horizontal line with the foot of a tower, CB, and on opposite sides. The distance between A and D is 535.4 feet while the angles of elevation of the top B are 12 degrees 46 minutes from A and 18 degrees 38 minutes from D. Let the perpendicular through D to line AB produced meet it at E and find the length of CB