題目係求r=4sin3θ三葉線其中一塊葉的面積,睇過marking都唔明,幫幫手~
附:0<=θ<=pie
及θ=pie/2為該圖形的對稱軸
HKALE00年純數卷2題3
2008-03-20 8:05 am
回答 (1)
2008-03-20 6:04 pm
✔ 最佳答案
With reference to the sketch below:圖片參考：http://i117.photobucket.com/albums/o61/billy_hywung/Mar08/Crazyint4.jpg
By formula, we can find out the area of one loop being the integration from θ = 0 to θ = π/3:
圖片參考：http://i117.photobucket.com/albums/o61/billy_hywung/Mar08/Crazyint5.jpg
Note: This topic has been out of today's AL P.Maths syllabus.
參考: My Maths knowledge
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080320000051KK00026