2013 June(71C) Math Question 44

Trigonometry

- Advanced sin, cos, tan functions

44. Li is standing at point L on the north side of the small canyon shown in the figure below. As measured by line of sight, Li is 2 miles from an observation tower at 7', and she is 3 miles from a scenic overlook at S. Li, the observation tower, and the scenic overlook are all at the same elevation. The measure of LS is 28°. Which of the following equations, when solved, gives the measure of LT ?

Choice F

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