Luttrell 2012
153
Basic Trigonometry
Final Exam 10
43. A right triangle has a hypotenuse of 60 and leg of 24. What is the measure of the other leg?
What are the angle measures?
44. The oldest tree in town casts a shadow of 52 m long on level ground. At the same time, a
boy 2 m tall casts a shadow 4 m long.
A.
How tall is the tree?
B.
If the boy, standing 60 m away, looks into binoculars at an osprey at the top of the
tree, what is the angle of elevation?
45. In a right triangle where sin x =
3
2
, find cos x.
46. A surveyor is measuring the distance across a small lake. He has set up his transit on side of
the lake 150 meters from a piling that is directly across from a pier on the other side of the lake.
From his transit, the angle between the piling and the pier is 72
̊
. What is the distance between
the piling and the pier to the nearest foot?
Bonus (2 pts): For what angle is sinθ = ½ and tanθ =
−
3
?