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2Â¥: Originally posted by nerdull at 2012-09-06 22:03:31
x = cos t ;
y = sin t ;
z = f(t) ,
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СÓêÃÈÃÈ: ½ð±Ò+1, 3Q 2012-09-07 09:46:49
x=f(t)cos(t)
Y=f(t)sin(t)
z=at
5Â¥2012-09-07 08:43:07
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