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    <title>MaplePrimes - answers and comments on Question, Polarplot issues with two polar equations</title>
    <link>http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations</link>
    <language>en-us</language>
    <copyright>2026 Maplesoft, A Division of Waterloo Maple Inc.</copyright>
    <generator>Maplesoft Document System</generator>
    <lastBuildDate>Wed, 10 Jun 2026 18:00:49 GMT</lastBuildDate>
    <pubDate>Wed, 10 Jun 2026 18:00:49 GMT</pubDate>
    <itunes:subtitle />
    <itunes:summary />
    <description>The latest answers and comments added to the Question, Polarplot issues with two polar equations</description>
    <image>
      <url>http://www.mapleprimes.com/images/mapleprimeswhite.jpg</url>
      <title>MaplePrimes - answers and comments on Question, Polarplot issues with two polar equations</title>
      <link>http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations</link>
    </image>
    <item>
      <title>spaces</title>
      <link>http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations?ref=Feed:MaplePrimes:Polarplot issues with two polar equations:Comments#answer142880</link>
      <itunes:summary>&lt;p&gt;You left out the spaces after 8 and 2.5&lt;/p&gt;
&lt;p&gt;Even better, always use multiplication signs.&lt;/p&gt;
&lt;p&gt;plots[polarplot]([8*cos(3*&amp;theta;),4-2.5*cos(&amp;theta;)]);&lt;/p&gt;</itunes:summary>
      <description>&lt;p&gt;You left out the spaces after 8 and 2.5&lt;/p&gt;
&lt;p&gt;Even better, always use multiplication signs.&lt;/p&gt;
&lt;p&gt;plots[polarplot]([8*cos(3*&amp;theta;),4-2.5*cos(&amp;theta;)]);&lt;/p&gt;</description>
      <guid>142880</guid>
      <pubDate>Thu, 31 Jan 2013 23:52:04 Z</pubDate>
      <itunes:author>ThU</itunes:author>
      <author>ThU</author>
    </item>
    <item>
      <title>Spaces are of no importance</title>
      <link>http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations?ref=Feed:MaplePrimes:Polarplot issues with two polar equations:Comments#comment142889</link>
      <itunes:summary>&lt;p&gt;See&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="left"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=142889/452766/9bd486bc3bd3f74cfb516e0e76ed85f9.gif" alt="plots:-polarplot([8*cos(3*theta), 4-2.5*cos(theta)])" width="319" height="23"&gt;&lt;/p&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="center"&gt;&lt;a href="http://www.maplesoft.com/support/faqs/MapleNet/redirect.aspx?param=plot_java_14206"&gt;&lt;img style="border: none;" src="/view.aspx?sf=142889/452766/e637e0530141135ebda1ae7ebf9c109a.gif" alt="" width="400" height="400" align="middle"&gt;&lt;/a&gt;&lt;/p&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="left"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=142889/452766/c66e6a5ad8135bf5b791e57f7c6deefb.gif" alt="plots:-polarplot([8*cos(3*theta), 4-2.5*cos(theta)])" width="331" height="23"&gt;&lt;/p&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="left"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=142889/452766/c1e0163d75048a058789acc01e23a6b6.gif" alt="``" width="11" height="23"&gt;&lt;/p&gt;
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&lt;input type="hidden" name="sequence" value="1"&gt; &lt;input type="hidden" name="cmd" value="none"&gt;&lt;/form&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;a href="/view.aspx?sf=142889/452766/spaces.mw"&gt;Download spaces.mw&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Could I give&amp;nbsp; advice to you (and to myself)?&amp;nbsp; Never claim something, not verifying it.&lt;/p&gt;</itunes:summary>
      <description>&lt;p&gt;See&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;form name="worksheet_form"&gt;
&lt;table style="width: 576px;" align="center"&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="left"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=142889/452766/a8aba130f2e2e3939169a95a871ed065.gif" alt="NULL" width="11" height="23"&gt;&lt;/p&gt;
&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="left"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=142889/452766/9bd486bc3bd3f74cfb516e0e76ed85f9.gif" alt="plots:-polarplot([8*cos(3*theta), 4-2.5*cos(theta)])" width="319" height="23"&gt;&lt;/p&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="left"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=142889/452766/c66e6a5ad8135bf5b791e57f7c6deefb.gif" alt="plots:-polarplot([8*cos(3*theta), 4-2.5*cos(theta)])" width="331" height="23"&gt;&lt;/p&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="center"&gt;&lt;a href="http://www.maplesoft.com/support/faqs/MapleNet/redirect.aspx?param=plot_java_14206"&gt;&lt;img style="border: none;" src="/view.aspx?sf=142889/452766/c1dc4241786df38f2e2eaba4d1c82930.gif" alt="" width="400" height="400" align="middle"&gt;&lt;/a&gt;&lt;/p&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="left"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=142889/452766/c1e0163d75048a058789acc01e23a6b6.gif" alt="``" width="11" height="23"&gt;&lt;/p&gt;
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&lt;input type="hidden" name="sequence" value="1"&gt; &lt;input type="hidden" name="cmd" value="none"&gt;&lt;/form&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;a href="/view.aspx?sf=142889/452766/spaces.mw"&gt;Download spaces.mw&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Could I give&amp;nbsp; advice to you (and to myself)?&amp;nbsp; Never claim something, not verifying it.&lt;/p&gt;</description>
      <guid>142889</guid>
      <pubDate>Fri, 01 Feb 2013 02:12:36 Z</pubDate>
      <itunes:author>Markiyan Hirnyk</itunes:author>
      <author>Markiyan Hirnyk</author>
    </item>
    <item>
      <title>@Markiyan Hirnyk&amp;nbsp;
You are correct.
*picks</title>
      <link>http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations?ref=Feed:MaplePrimes:Polarplot issues with two polar equations:Comments#comment142923</link>
      <itunes:summary>&lt;p&gt;&lt;a href="http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations#comment142889"&gt;@Markiyan Hirnyk&lt;/a&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;You are correct.&lt;/p&gt;
&lt;p&gt;*picks up his 3 up votes and runs away*&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;a href="http://www.mapleprimes.com/view.aspx?sf=142889/452766/spaces.mw"&gt;Download spaces.mw&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Could I give&amp;nbsp; advice to you (and to myself)?&amp;nbsp; Never claim something, not verifying it.&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;</itunes:summary>
      <description>&lt;p&gt;&lt;a href="http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations#comment142889"&gt;@Markiyan Hirnyk&lt;/a&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;You are correct.&lt;/p&gt;
&lt;p&gt;*picks up his 3 up votes and runs away*&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;a href="http://www.mapleprimes.com/view.aspx?sf=142889/452766/spaces.mw"&gt;Download spaces.mw&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Could I give&amp;nbsp; advice to you (and to myself)?&amp;nbsp; Never claim something, not verifying it.&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;</description>
      <guid>142923</guid>
      <pubDate>Fri, 01 Feb 2013 16:39:27 Z</pubDate>
      <itunes:author>ThU</itunes:author>
      <author>ThU</author>
    </item>
    <item>
      <title>I also had problems with this command!</title>
      <link>http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations?ref=Feed:MaplePrimes:Polarplot issues with two polar equations:Comments#comment143054</link>
      <itunes:summary>&lt;p&gt;&lt;a href="http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations#comment142923"&gt;@ThU&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;I also had problems with this command!&lt;br&gt; &lt;/p&gt;
&lt;form name="worksheet_form"&gt;
&lt;table style="width: 576px;" align="center"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td&gt;
&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="left"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=143054/453108/0acbf5cd7a7b4561a984786a909d3e2c.gif" alt="a := [8*cos(3*theta), 4-2.5*cos(theta)]" width="260" height="23"&gt;&lt;/p&gt;
&lt;table&gt;
&lt;tbody&gt;
&lt;tr valign="baseline"&gt;
&lt;td&gt;
&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="center"&gt;&lt;img style="vertical-align: -7;" src="/view.aspx?sf=143054/453108/42f1852b1bca814b7ef7f19babbd62fd.gif" alt="[8*cos(3*theta), 4-2.5*cos(theta)]" width="178" height="26"&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td style="color: #000000; font-family: Times, serif; font-weight: bold; font-style: normal;" align="right"&gt;(1)&lt;/td&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="center"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=143054/453108/b7f0ba9a0dc3408f13e45b9af10a2e4a.gif" alt="" width="11" height="23"&gt;&lt;/p&gt;
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&lt;td style="color: #000000; font-family: Times, serif; font-weight: bold; font-style: normal;" align="right"&gt;(2)&lt;/td&gt;
&lt;/tr&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="left"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=143054/453108/54cb38b9ea89a1be7563929afa66fae6.gif" alt="plots:-display(map(plots:-polarplot, a, color = [&amp;quot;Red&amp;quot;, &amp;quot;Blue&amp;quot;]))" width="398" height="23"&gt;&lt;/p&gt;
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&lt;td style="color: #000000; font-family: Times, serif; font-weight: bold; font-style: normal;" align="right"&gt;&amp;nbsp;&lt;/td&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="left"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=143054/453108/83ee3dea5d48a7158fdef4d32b3b55c2.gif" alt="plots:-display(map(plots:-polarplot, a), color = [&amp;quot;Red&amp;quot;, &amp;quot;Blue&amp;quot;])" width="398" height="23"&gt;&lt;/p&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="left"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=143054/453108/b76d06b34f46202da88b7486525345ba.gif" alt="plots:-polarplot([8*cos(3*theta), 4-2.5*cos(theta)])" width="327" height="23"&gt;&lt;/p&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="left"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=143054/453108/9ff2dd6f45bebb68d3712562fe142a42.gif" alt="NULL" width="11" height="23"&gt;&lt;/p&gt;
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&lt;input type="hidden" name="sequence" value="1"&gt; &lt;input type="hidden" name="cmd" value="none"&gt;&lt;/form&gt;
&lt;p&gt;&lt;br&gt; &lt;/p&gt;
&lt;p&gt;&lt;a href="/view.aspx?sf=143054/453108/spaces16.mw"&gt;Download spaces16.mw&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;</itunes:summary>
      <description>&lt;p&gt;&lt;a href="http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations#comment142923"&gt;@ThU&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;I also had problems with this command!&lt;br&gt; &lt;/p&gt;
&lt;form name="worksheet_form"&gt;
&lt;table style="width: 576px;" align="center"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td&gt;
&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="left"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=143054/453108/0acbf5cd7a7b4561a984786a909d3e2c.gif" alt="a := [8*cos(3*theta), 4-2.5*cos(theta)]" width="260" height="23"&gt;&lt;/p&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="center"&gt;&lt;img style="vertical-align: -7;" src="/view.aspx?sf=143054/453108/42f1852b1bca814b7ef7f19babbd62fd.gif" alt="[8*cos(3*theta), 4-2.5*cos(theta)]" width="178" height="26"&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td style="color: #000000; font-family: Times, serif; font-weight: bold; font-style: normal;" align="right"&gt;(1)&lt;/td&gt;
&lt;/tr&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="center"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=143054/453108/b7f0ba9a0dc3408f13e45b9af10a2e4a.gif" alt="" width="11" height="23"&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td style="color: #000000; font-family: Times, serif; font-weight: bold; font-style: normal;" align="right"&gt;(2)&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="left"&gt;&lt;img style="vertical-align: -6;" src="/view.aspx?sf=143054/453108/54cb38b9ea89a1be7563929afa66fae6.gif" alt="plots:-display(map(plots:-polarplot, a, color = [&amp;quot;Red&amp;quot;, &amp;quot;Blue&amp;quot;]))" width="398" height="23"&gt;&lt;/p&gt;
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&lt;p style="margin: 0 0 0 0; padding-top: 0px; padding-bottom: 0px;" align="center"&gt;&lt;a href="http://www.maplesoft.com/support/faqs/MapleNet/redirect.aspx?param=plot_java_14206"&gt;&lt;img style="border: none;" src="/view.aspx?sf=143054/453108/04eda74ab58e8862c39f3091b2574989.gif" alt="" width="400" height="400" align="middle"&gt;&lt;/a&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td style="color: #000000; font-family: Times, serif; font-weight: bold; font-style: normal;" align="right"&gt;&amp;nbsp;&lt;/td&gt;
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&lt;p&gt;&lt;br&gt; &lt;/p&gt;
&lt;p&gt;&lt;a href="/view.aspx?sf=143054/453108/spaces16.mw"&gt;Download spaces16.mw&lt;/a&gt;&lt;/p&gt;
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&lt;p&gt;&amp;nbsp;&lt;/p&gt;</description>
      <guid>143054</guid>
      <pubDate>Mon, 04 Feb 2013 20:04:53 Z</pubDate>
      <itunes:author>herclau</itunes:author>
      <author>herclau</author>
    </item>
    <item>
      <title>No problem</title>
      <link>http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations?ref=Feed:MaplePrimes:Polarplot issues with two polar equations:Comments#comment143057</link>
      <itunes:summary>&lt;p&gt;&lt;a href="http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations#comment143054"&gt;@herclau&lt;/a&gt; Executing your file on Maple 16.02 under Windows 7, 32 bit, I only see that the color option does not work in the display command. See &lt;a href="/view.aspx?sf=143057/453113/executedspaces16.mw"&gt;executedspaces16.mw&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;PS. At least, you don't mention any spaces.&lt;/p&gt;</itunes:summary>
      <description>&lt;p&gt;&lt;a href="http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations#comment143054"&gt;@herclau&lt;/a&gt; Executing your file on Maple 16.02 under Windows 7, 32 bit, I only see that the color option does not work in the display command. See &lt;a href="/view.aspx?sf=143057/453113/executedspaces16.mw"&gt;executedspaces16.mw&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;PS. At least, you don't mention any spaces.&lt;/p&gt;</description>
      <guid>143057</guid>
      <pubDate>Mon, 04 Feb 2013 20:45:13 Z</pubDate>
      <itunes:author>Markiyan Hirnyk</itunes:author>
      <author>Markiyan Hirnyk</author>
    </item>
    <item>
      <title>@Markiyan Hirnyk&amp;nbsp;If I execute the worksheet</title>
      <link>http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations?ref=Feed:MaplePrimes:Polarplot issues with two polar equations:Comments#comment143243</link>
      <itunes:summary>&lt;p&gt;&lt;a href="http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations#comment143057"&gt;@Markiyan Hirnyk&lt;/a&gt;&amp;nbsp;If I execute the worksheet that you prepared, I get the same results that i had originally. To get around this I just wrote the program on my laptop and then ran to the computer lab at school, executed it, and printed it. Not sure why this is happening as I am absolutely certain, having ran your version, that all commands are being inputted correctly.&lt;br&gt;&lt;br&gt;Thanks for the help everyone. &amp;nbsp;&lt;/p&gt;</itunes:summary>
      <description>&lt;p&gt;&lt;a href="http://www.mapleprimes.com/questions/142879-Polarplot-Issues-With-Two-Polar-Equations#comment143057"&gt;@Markiyan Hirnyk&lt;/a&gt;&amp;nbsp;If I execute the worksheet that you prepared, I get the same results that i had originally. To get around this I just wrote the program on my laptop and then ran to the computer lab at school, executed it, and printed it. Not sure why this is happening as I am absolutely certain, having ran your version, that all commands are being inputted correctly.&lt;br&gt;&lt;br&gt;Thanks for the help everyone. &amp;nbsp;&lt;/p&gt;</description>
      <guid>143243</guid>
      <pubDate>Thu, 07 Feb 2013 23:17:20 Z</pubDate>
      <itunes:author>dot4xdash</itunes:author>
      <author>dot4xdash</author>
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