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Pre-Calculus Homework Solutions 224

# Pre-Calculus Homework Solutions 224 - 21 b2 182 324 22 22...

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21. b 2 5 ¬ c 2 1 d 2 2 2 cd cos B 18 2 5 ¬ 15 2 1 11 2 2 2(15)(11)cos B 324 5 ¬ 346 2 330cos B 2 22 5 ¬ 2 330cos B } 2 2 3 2 3 2 0 } 5 ¬ cos B B 5 ¬ cos 2 1 1 } 3 2 3 2 0 } 2 B < ¬ 86° } sin b B } 5 ¬0 } sin c C } } sin 1 8 8 } 5 ¬ } si 1 n 5 C } 15sin86° 5 ¬ 18sin C } 15s 1 in 8 86° } 5 ¬ sin C sin 2 1 1 } 15s 1 in 8 86° } 2 5 ¬ C 56° < ¬ C m / B 1 m / C 1 m / D 5 ¬ 180 86 1 56 1 m / D < ¬ 180 m / D < ¬ 38 22. } sin a A } 5 ¬ } sin c C } } sin a 42° } 5 ¬ } sin 6 77° } 6sin42° 5 ¬ a sin77° } 6 s s in in 7 4 7 2 ° ° } 5 ¬ a 4.1 < ¬ a m / A 1 m / B 1 m / C 5 ¬ 180 42 1 m / B 1 77 5 ¬ 180 m / B 5 ¬ 61 } sin b B } 5 ¬ } sin c C } } sin b 61° } 5 ¬ } sin 6 77° } 6sin61° 5 ¬ b sin77° } 6 s s in in 7 6 7 1 ° ° } 5 ¬ b 5.4 < ¬ b 23. c 2 5 ¬ a 2 1 b 2 2 2 ab cos C c 2 5 ¬ 10.3 2 1 9.5 2 2 2(10.3)(9.5)cos37° c 2 5 ¬ 196.34 2 195.7cos37° c 5 ¬ Ï 196.3 w 4 2 19 w 5.7cos w 37° w c < ¬ 6.3 } sin a A } 5 ¬ } sin c C } } s 1 i 0 n . A
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