precal 20s october 30

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Answers to the PreTest 1. a) 144 0 b) 87 0 , 92 0 c) 57 0 2. h = 384m 3. A = 29.8 0 , B = 94.9 0 , C = 55.3 0 4. a) BC = 3.5, CA = 4.0 b) CD = 6.0, BC/AC = 7/4 = 1.75. c) The ratio DC/BD is sin 60 0 (or cos 30 0 , which is the same thing). The equivalent ratio in ABC is BC/AC.

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Page 1: PreCal 20S October 30

Answers to the Pre­Test

1.  a) 1440b) 870, 920c) 570

2. h = 384m

3. A = 29.80, B = 94.90, C = 55.30

4.  a) BC = 3.5, CA = 4.0b) CD = 6.0, BC/AC = 7/4 = 1.75.c) The ratio DC/BD is sin 600 (or cos 300, which is the same thing).     The equivalent ratio in ABC is BC/AC.