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1分的角大約等於290.9μrad
巨大八爪鱼
武林盟主 二十一级
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Floor 1 Posted at: 6/27/15 20:52
1分( ′) ≈ 0.0002909弧度(rad)
4.85*60=291
291*60=17460
17460*180=3142800
巨大八爪鱼
武林盟主 二十一级
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Floor 2 Posted at: 6/27/15 20:55
R = 6371.393km
α ≈ 0.0002909rad
x ≈ αR ≈ 1.853438224km
巨大八爪鱼
武林盟主 二十一级
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Floor 3 Posted at: 6/27/15 20:55
因此,一海里約等於1.85km
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Clicks: 807 Replies: 2
Author: 巨大八爪鱼
Last reply: 巨大八爪鱼
Last reply time: 6/27/15 20:55
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