Similar Triangles, Right Triangles, And The Definition Of The Sine, Cosine And Tangent Functions Of Angles Of A Right Triangle Worksheets With Answer Key Page 39
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43II. TRIGONOMETRY – ANSWER SECTION
ANGLES
π
π
3
17
−
2. -765° ,
radians
3.
radians
1. -120°
4. 70°
5. -52.9°
4
5
ARC LENGTH
6. 4.76
7. 22.62
AREA OF A SECTOR
8. 61.58
9. 10.47
THE TRIGONOMETRIC FUNCTIONS
77
11. -2.71624
12. 6.68153
10. (a)
(b) 14.62
;
9
θ
14. -4.12838
15. -5.73769
16. C) 309°
13. tan
is undefined
SOLVING RIGHT TRIANGLES
17. 0.70
18. -14.9°
19. c = 6.44, A = 24.1°, B = 65.9°
SOLVING OBLIQUE TRIANGLES
20. b = 10.12
21. D = 128°, d = 134.4, p = 77.5
22. 1) C = 73.7°, B = 83.3°, b = 561.7
23. no solution
2) C = 106.3°, B = 50.7°, b = 437.7
25. E) none of these (A ≅ 16.79°)
24. C = 54.8°, B = 26.6°, b = 4.2
LAW OF COSINES
26. a = 38.99, B = 55.87°, C = 22.13°
27. no solution (2 + 3 < 7)
28. 68.15°
2
2
2
29. P = 16.26°, A =90°, S = 73.74° (25
= 24
+ 7
)
30. A = B = C = 60°
NARRATIVE PROBLEMS
31. 295.7 feet
32. 1,032.3 feet
33. 113.3 feet
34. 1,039.2 feet
GRAPHING TRIGONOMETRIC FUNCTIONS
2
3
−
35. 1
37. 7
38. undefined
36.
39. E)
2
3
- 39 -
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