Plane trigonometry, by S.L. Loney.

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TRIGONOMETRY.

XXX. (Pages 197-200.)
1. 63013'2"; 43058'28". 2., 117038'45"; 27~38'45",
3. 8^'7; 7906'24"; 40053'36".
4. 87~27'25'5"; 32032/345a".
5. 40053'26"; 19 6'24"; /7:2.
6. 71~44'30": 48015'30". 7. 78017'41"; 48036'19".
8. 108 12'25'5"; 49027'34'5".
9. A=45~; B=75~; c=^/6. 10. ^6; 15~; 105~.
11. -8965. 14. 40yds.; 120~; 30~.
15. 7-589467; 108~ 26'6"; 18~26'6"; 5307'48".
16. 226-87; 73034'50/; 39045'10". 17. 2-529823.
18. A = 8307'39"/; B=42016'21"; c= 199 099.
19. B=110048'15"; C=26056'15"; a=93-5192.
20. 7301/51" and 48041'9".
21. 88030'1" and 33030'59".
XXXI. (Pages 205-207.)
1. There is no triangle.
2. B1= 30~, C1=105~, and bl=/2; B2=60~, C2 =75,
and b2= ^/6.
3. B= 30~, C,=120~, and b1=100; B2=-90~, C2=60~,
and b2 = 200.
5. 4 /3 2,/5.
6. 100^3; the triangle is right-angled.
8. 33029'30" and 101~30'30". 9. 17'1 or 3-68.
10. (1) The triangle is right-angled and B 60~.
(2) B1=8041' and C1= 141019'; B2= 111019' and 38041'.
11. 65~54' and 42~1'12".
12. 5-988... and 2-6718... miles per hour.
13. 6302'12" or 116057'48".
14. 62031'23" and 102~17'37", or 117028'37" and 47020'23".
15 59266-1.