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點解ans係 r α 呀?
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Help!!!
更新1:
2 ans 係 r α/2
Math CE 93 9(a) (i)急救呀
回答 (1)
2009-12-24 10:41 pm
✔ 最佳答案
Remember, α is in terms of radian.So, the area of sector OACB = 1/2 r^2α
(This is supposed to be out of syllabus in maths, but in syllabus in add. maths)
參考: Physics king
收錄日期: 2021-04-19 20:56:04
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