題組內容
4. Multiple Integrals (20%)
(b) Find the area in the xy-plane between the y-axis and the line 
,below y=cos x， and above y=sinx.
阿摩線上測驗
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阿摩線上測驗
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(b) Find the area in the xy-plane between the y-axis and the line ,below y=cos x， and above y=sinx.