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539 bpr 1 
# record 1: header: parent, keywords
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# record 2: calling parameters
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# record 3: submit buttons
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# record 4: html form content
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:geometry, plot, curve, 2D curve, polar curve, polar,
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polar coordinates, polar system,
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polar curve plot, plot polar curve,
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curve 2D, 2D curve, graph, graphing
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:module, tool/geometry/animtrace.$search_lang
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cmd, new
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size, 650x480
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type, explicit2D
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coord, polar
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set_border, 1
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set_zeroaxis, 0
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set_grid, 0
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set_tics, 0
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set_transparent, 0
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xsize, 300
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ysize, 300
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:, Plot Polar Curve
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:
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 $submit1
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r = <input name="r1" type="text" size="45" value="1 - sin(t)" />
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 (t is the polar angle.)
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<br />
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 Plot range:
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 <input size="6" name="tleft" value="0" /> &le; t &le;
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 <input size="6" name="tright" value="2pi" /> ,
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 <input size="6" name="xleft" /> &le; x &le;
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 <input size="6" name="xright" /> ,
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 &nbsp;
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 <input size="6" name="yleft" /> &le; y &le;
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 <input size="6" name="yright" /> .
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