2009-I-17
答案:(a) (i) $22.3\text{ m}$ (ii) $48.5^\circ$ (iii) $337\t
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= & 30~000\times (1 + 5
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= & 1 : 5~000 \
設 $\theta$ 為由 $P$ 測 $Q$ 的俯角。因為 $AP//QC$,所以 $\theta = 40^
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= & 48 \div 4 \\
=
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& \text{球體 }A &