8.1 Review Worksheet (continued)
32. XZ
33. KL
34. EF D
J
Y
F
12°
33 in.
83.1 m
E
25°
9.5 ft
Z
X
61°
L
K
35. A jump ramp for waterskiing makes an angle of 15 ° with the surface of the water. The ramp rises 1.58 m above the surface. What is the length of the ramp to the nearest hundredth of a meter?
1.58 m
15°
8.1.3 Solving Right Triangles Use the given trigonometric ratio to determine which angle of the triangle is ∠ A. 36. = A tan 5 12 37. tan A = 2.4 38. = A sin
18 cm
7.5 cm
1
2
12 13
19.5 cm
5 13
12 13
5 13
41.
39.
40.
= A cos
= A cos
= A sin
Use your calculator to find each angle measure to the nearest degree. 42. sin − 1 (0.3l) 43. tan − 1 (l)
44. cos − 1 (0.8)
45. cos − 1 (0.72)
46. tan − 1 (l.55)
⎛ ⎝ ⎜
⎞ ⎠ ⎟
9 17
47.
1
− sin
106
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