Are the arc length formulas for parametric and standard equations valid for lines that go beneath the x-axis? I'm asking this because I know definite integrals consider anything below the x-axis as opposite to over the x-axis. Cheers.

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- Jan 28th 2009, 07:29 AMKaitosanSimple arc length question
Are the arc length formulas for parametric and standard equations valid for lines that go beneath the x-axis? I'm asking this because I know definite integrals consider anything below the x-axis as opposite to over the x-axis. Cheers.

- Jan 28th 2009, 07:34 AMskeeter
relationship of the curve to the x-axis doesn't matter.

- Jan 28th 2009, 08:34 AMKaitosan
Ok, then. Thanks. (Giggle)