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at the end of lecture 17, when talking about rotating around a point on circumference, Professor Aroux set the inner upper limit to be 2acos(angle), but why not just 2a? Thanks

  • one year ago
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  1. Umangiasd
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    Because that limit is varying, as you can notice, when you take, for example, a/2 in the x axis, the distance between the origin and "r" is different than the distance when you take x=2a. |dw:1354775027342:dw|

    • one year ago
  2. sunsunsun1225
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    oh, thanks

    • one year ago
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spraguer (Moderator)
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is replying to Can someone tell me what button the professor is hitting...


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