Method code for $math.rotation_mat_2d()

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  1: arg angle;
  2: var s, c;
  3: 
  4: s = sin(angle);
  5: c = cos(angle);
  6: return [[c, s, 0.0], [-s, c, 0.0], [0.0, 0.0, 1.0]];

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// Miroslav Silovic
// Created 19-Oct-1996 as a part of ColdCore, see: @help Credit