1條f.2 mathz,,5該..!!
2008-05-21 2:59 am
When the sun shines vertically on a 6m long inclined post,the length of the shadow on the horizontal ground is 4m.Find the angle between the post and the grond.
回答 (2)
2008-05-22 4:26 am
✔ 最佳答案
以直角三角形,長桿長度為斜邊 C, 影子為底邊BYou can draw a picture first then you will know how to calculate
Let x = angle between the post and the ground.
cos x = B / C
cos x = 4m / 6m
x = 2 / 3
x = anticos(2/3)
= 48.19 deg (approximated to 2 decimal place)
2008-05-21 3:01 am
當太陽垂直照射傾向於的一6米長時，公佈， 在水準的地上的陰影的長度是4 m.Find在崗位和grond之間的角度。
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https://hk.answers.yahoo.com/question/index?qid=20080520000051KK02037