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  1. #1
    la vache fantôme phantomcow2's Avatar
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    rcos(t)*rsin(t)*r*dr*d(t) polar coordinates

    Okay, so I have a calc exam this Friday. He said he wont be asked to prove that double integral of f(x,y) is equal to rcos(t)*rsin(t)*r*dr*dt in polar coordinates, but that it's fair game to ask some theoretical question about it. We didn't go into a lot of detail about this in class. I believe he will ask about the additional "r" that is tagged to the end; there's nothing else he can really ask about it in my opinion. Why does this "r" exist?
    C://dos
    C://dos.run
    run.dos.run

  2. #2
    la vache fantôme phantomcow2's Avatar
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    Never mind this, a friend just linked me to a video that explains it all.
    C://dos
    C://dos.run
    run.dos.run

  3. #3
    Hazardous Taerom's Avatar
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    Quote Originally Posted by phantomcow2 View Post
    Why does this "r" exist?
    What is this, philosophy class?

  4. #4
    babylon by bike Standalone's Avatar
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    This is why I quit after Calc 242, switched to Biology, then English, which I now teach.
    The bicycle, the bicycle surely, should always be the vehicle of novelists and poets. Christopher Morley

  5. #5
    Squirrelly Member trsidn's Avatar
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    I've slept too many times since then.....
    Quote Originally Posted by Nicodemus View Post
    Yet more proof that I'm.. well, pretty much right about everything.

  6. #6
    On my TARDIScycle! KingTermite's Avatar
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    Quote Originally Posted by trsidn View Post
    i've slept too many times since then.....
    +1....a few drinks here and there too.
    Quote Originally Posted by coffeecake View Post
    - it's pretty well established that Hitler was an *******.

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