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Mathematics 18 Online
OpenStudy (anonymous):

find the curvature k(t) of curve r(t)=(-1sint)i + (-1sint)j + (-2cost)k. I got k(t) = 2sqrt2/(1+2cos^(2)t)^(3/2)

OpenStudy (anonymous):

but the answer obviously is wrong so I'm not sure where I messed up.

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