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anonymous

  • 5 years ago

Trying to figure out how to find the length of a polar curve eq - r=7sin(theta + Pi/4). I do not know how to do this HELP

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  1. bahrom7893
    • 5 years ago
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    what is the equation? r = 7Sin(theta+Pi/4) or - r = 7Sin(theta+Pi/4) ?

  2. anonymous
    • 5 years ago
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    r=

  3. bahrom7893
    • 5 years ago
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    okay so..

  4. bahrom7893
    • 5 years ago
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    \[Length = \int\limits_{a}^{b} \sqrt{r^2+(dr/d \theta)^2}d \theta\]

  5. bahrom7893
    • 5 years ago
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    Now the hard part here is, finding the limits.. i forgot how to do that, let me graph this thing, see what it looks like..

  6. bahrom7893
    • 5 years ago
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    still tryin to figure out limits...

  7. bahrom7893
    • 5 years ago
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    do you know how to find limits? I've always been bad at polar stuff...

  8. anonymous
    • 5 years ago
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    no - this problem came from my College algebra/trig 400 class. Not doing integration yet.

  9. bahrom7893
    • 5 years ago
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    I think i know the limits, but sorry I can't solve this without integrating, never learned any other way of finding arclength..=(

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