Practice and Applications

7. $407.0 °, - 313.0 °$
9. $142.5 °, - 577.5 °$
11. $31.9 °$
13. $- 83.35 °$
15. $17 ° 3 0^{'}$
17. $749 ° 4 5^{'}$
19. $\sin θ = \frac{7}{25}, \cos θ = \frac{24}{25}, \tan θ = \frac{7}{24}, \cot θ = \frac{24}{7},$ $\sec θ = \frac{25}{24}, \csc θ = \frac{25}{7}$
21. $\sin θ = \frac{1}{\sqrt{2}}, \cos θ = \frac{1}{\sqrt{2}}, \tan θ = 1, \cot θ = 1,$ $\sec θ = \sqrt{2}, \csc θ = \sqrt{2}$
23. 0.923, 2.40
25. 0.447, 1.12
27. 0.945, 1.06
29. 0.952
31. 13.24
33. 1.24
35. 0
37. $31.8 °$
39. $57.57 °$
41. $12.25 °$
43. $88.3 °$
45. $8.00 °$
47. not possible
49. $(\frac{\sqrt{21}}{5}, \frac{2}{5})$
51. $a = 1.83, B = 73.0 °, c = 6.27$
53. $A = 51.5 °, B = 38.5 °, c = 104$
55. $B = 52.5 °, b = 15.6, c = 19.7$
57. $A = 31.61 °, a = 4.006, B = 58.39 °$
59. $a = 0.6292, B = 40.33 °, b = 0.5341$
61. 4.6
63. 61.2
65. 10.5
67. $x / h = \cot A$

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Basic Technical Mathematics, 11th Edition by Allyn J. Washington, Richard Evans