Pre-Calculus Homework Solutions 234

# Pre-Calculus Homework Solutions 234 - 20 c2 c2 c2 c c sin...

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20. c 2 ¬ 5 a 2 1 b 2 2 2 ab cos C c 2 ¬ 5 15 2 1 17 2 2 2(15)(17)cos45° c 2 ¬ 5 514 2 510cos45° c ¬ 5 Ï 514 2 w 510co w s45° w c ¬ < 12.4 } sin c C } ¬ 5 } sin a A } } si 1 n 2 4 .4 } ¬ 5 } si 1 n 5 A } 15sin45° ¬ 5 12.4sin A } 15 1 si 2 n .4 45° } ¬ 5 sin A sin 2 1 1 } 15 1 si 2 n .4 45° } 2 ¬ 5 A 59° ¬ < A m / A 1 m / B 1 m / C ¬ 5 180 59 1 m / B 1 45 ¬ < 180 m / B ¬ < 76 21. } sin a A } ¬ 5 } sin b B } } s 1 i 2 n . A 2 } ¬ 5 } si 1 n 0 4 .9 } 10.9 sin A ¬ 5 12.2sin48° sin A ¬ 5 } 12.2 1 s 0 i . n 9 48° } A ¬ 5 sin 2 1 1 } 12.2 1 s 0 i . n 9 48° } 2 A ¬ < 56° m / A 1 m / B 1 m / C ¬ 5 180 56 1 48 1 m / C ¬ < 180 m / C ¬ < 76 } sin c C } ¬ 5 } sin b B } } sin c 76° } ¬ 5 } si 1 n 0 4 .9 } 10.9sin76° ¬ 5 c sin48° } 10 s .9 in si 4 n 8 7 ° } ¬ 5 c 14.2 ¬ < c 22. a 2 ¬ 5 b 2 1 c 2 2 2 bc cos A 19 2 ¬ 5 23.2 2 1 21 2 2 2(23.2)(21)cos A 361 ¬ 5 979.24 2 974.4cos A 2 618.24 ¬ 5 2 974.4cos A } 2 2 6 9 1 7 8 4 .2 .4 4 } ¬ 5 cos A A ¬ 5
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