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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

Mathematics
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what is the equation? r = 7Sin(theta+Pi/4) or - r = 7Sin(theta+Pi/4) ?
r=
okay so..

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Other answers:

\[Length = \int\limits_{a}^{b} \sqrt{r^2+(dr/d \theta)^2}d \theta\]
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..
still tryin to figure out limits...
do you know how to find limits? I've always been bad at polar stuff...
no - this problem came from my College algebra/trig 400 class. Not doing integration yet.
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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