[積分] 三重積分的問題
Find the volume cut out of the sphere x^2+y^2+z^2=4 by the
cylinder x^2+y^2=2x
我想問的是積分後的θ要怎麼看?
小弟算的積分是∫ ∫ √4-r^2 rdrdθ
r是0~2cosθ
但θ要怎找啊??
這種求體積每題都不太一樣
有些是0~π/2 有些是2 X 0~π/2
有沒有大大可以教我如何判斷??
感謝~
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