Question

（本題滿分6分）蓮城中學(xué)九年級(jí)數(shù)學(xué)興趣小組為測(cè)量校內(nèi)旗桿高度，如圖，在C點(diǎn)測(cè)得旗桿頂端A的仰角為30°，向前走了6米到達(dá)D點(diǎn)，在D點(diǎn)測(cè)得旗桿頂端A的仰角為60°(測(cè)角器的高度不計(jì)).
⑴AD＝_______米;
⑵求旗桿AB的高度（）.

Answer 1

解：（1）設(shè)=，=··················1分
∴tan30° = ························ 2分
 =
解得：=3····························3分
=3
∴=6·····························4分
故答案為：6
（2）∵=3，=6
∴==3≈5.20米···················6分解析:
略