Pre-Calculus Homework Solutions 226

Pre-Calculus Homework Solutions 226 - 2 34. 196 493 493 680...

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34. , 2 5 ¬ m 2 1 n 2 2 2 mn cos L 14 2 5 ¬ 20 2 1 17 2 2 2(20)(17)cos L 196 5 ¬ 689 2 680cos L 2 493 5 ¬ 2 680cos L } 2 2 4 6 9 8 3 0 } 5 ¬ cos L L 5 ¬ cos 2 1 1 } 4 6 9 8 3 0 } 2 L < ¬ 43.5° } sin , L } 5 ¬ } si m n M } } sin 1 4 4 3.5° } 5 ¬ } si 2 n 0 M } 20sin43.5° 5 ¬ 14sin M } 20si 1 n 4 43.5° } 5 ¬ sin M sin 2 1 1 } 20si 1 n 4 43.5° } 2 5 ¬ M 79.5° < ¬ M m / L 1 m / M 1 m / N 5 ¬ 180 43.5 1 79.5 1 m / N < ¬ 180 m / N < ¬ 57.0 35. m 2 5 ¬ , 2 1 n 2 2 2 , n cos M m 2 5 ¬ 14 2 1 21 2 2 2(14)(21)cos60° m 2 5 ¬ 637 2 588cos60° m 5 ¬ Ï 637 2 w 588co w s60° w m < ¬ 18.5 } sin , L } 5 ¬ } si m n M } } si 1 n 4 L } 5 ¬ } si 1 n 8 6 .5 } 18.5sin L 5 ¬ 14sin60° sin L 5 ¬ } 14 1 si 8 n .5 60° } L 5 ¬ sin 2 1 1 } 14 1 si 8 n .5 60° } 2 L < ¬ 40.9° m / L 1 m / M 1 m / N 5 ¬ 180 40.9 1 60 1 m / N < ¬ 180 m / N < ¬ 79.1 36. , 2 5 ¬ m 2 1 n 2 2 2 mn cos L 14 2 5 ¬ 15 2 1 16 2 2 2(15)(16)cos L 196 5 ¬ 481 2 480cos L 2 285 5 ¬ 2 480cos L } 2 2 2 4 8 8
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