Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
将 y = sin x 在 [0, pi] 上绕y轴旋转(壳)。(提示:分部积分。)
将 y = sin x 在 [0, pi] 上绕y轴旋转(壳)。(提示:分部积分。)
Natural Language
Math Input
Extended Keyboard