题目内容
(本题满分6分)莲城中学九年级数学兴趣小组为测量校内旗杆高度,如图,在C点测得旗杆顶端A的仰角为30°,向前走了6米到达D点,在D点测得旗杆顶端A的仰角为60°(测角器的高度不计).⑴AD=_______米;
⑵求旗杆AB的高度(


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





∴tan30° =



解得:


∴

故答案为:6
(2)∵


∴



略

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