Question 481175
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Hi,
<img src="http://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Trigonometry_triangle.svg/200px-Trigonometry_triangle.svg.png ">
A 15-foot ladder leans against a wall at 71°angle of elevation.
distance (b) from the ladder's base to the wall:
 cos71°= b/15ft, 15ft*cos71° = b = 4.8835ft