4
lesson pretestMultiple Choice

Pretest

Question 4 • Mathematics III

A support beam needs to be placed at a 28 degrees angle of elevation so that the top meets a vertical beam 1 point 6 meters above the horizontal floor. The vertical beam meets the floor at a 90 degrees angle. Law of sines: sine of cap A over A is equal to sine of cap b over b is equal to sine of cap c over c Approximately how far from the vertical beam should the lower end of the support beam be placed along the horizontal floor?

Answer
A
3 point 4 meters
B
4 point 4 meters
C
3 point 0 meters
D
3 point 9 meters
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