Plane trigonometry, by S.L. Loney.

xiv

TRIGONOMETRY.

21. 75,/3 ft. 22. c(1-sin a)seca.
23. 114-122 ft. 25. 1069-745645 ft.
27. The angle whose tangent is.. 30, 45~.
33. 18~24'6". 35. tana sec /3: 1.
38. 91-896 ft. 39. 1960-95 yds.
40. 2-45832 miles. 41. 333-4932 ft.
XXXV. (Pages 227, 228.)
1. 84. 2. 216. 3. 630. 4. 3720.
5. 270. 6. 117096. 7. 1470.
8. 1-183.... 12. 35 yds. and 26 yds. nearly.
13. 14-941... inch. i14. 5, 7, and 8 ft. 15. 120~.
17. 45~ and 105~; 135~ and 15~.
18. 17-1064... sq. ins.
XXXVI. (Pages 235, 236.)
3. 8-, 1~, 8, 2, and 24 respectively.
XXXVII. (Pages 244-248.)
35. 2-1547... or -1547 times the radius of each circle.
39. An=+(-1).. 4 —.......
XXXVIII. (Pages 253, 254.)
1. (1) 3 J105ft.; (2) 10/7ft. 3. 15 and 2 ft.
XXXIX. (Pages 257-259.)
1. 7798 ins. 2. 3-215.
3. (1) 1-720... sq. ft.; (2) 2-598... sq. ft.;
(3) 4-8284... sq. ft.; (4) 7-694... sq. ft.;
(5) 11-196... sq. ft.
4. 1-8866... sq. ft. 5. 3-3136... sq. ft.
6. 2+ ^2:4; 2+ J 2:.2. 12. 3.
14. 6. 15. 9 or 16. 16. 20 and 10.