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# Super Quick Question about Polar Area watch

1. I understand that they are trying to find the area of the two segments, but why is the limit 0? I know why the other limit is pi/3, but the limit theta = 0 doesn't give you r=0.

(The curve equatuons are r= 2+costheta and r=5costheta)
2. (Original post by creativebuzz)

I understand that they are trying to find the area of the two segments, but why is the limit 0? I know why the other limit is pi/3, but the limit theta = 0 doesn't give you r=0.

(The curve equatuons are r= 2+costheta and r=5costheta)
Can't properly make out what's going on in that image, but I suspect they're exploiting the symmetry of the curves. Rather than going from -pi/3 to pi/3, they're going from 0 to pi/3 and multiplying by 2.

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Updated: November 7, 2015
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