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      <title>Quan hệ giá trị lượng giác by Cao Phan Anh Dũng</title>
      <link>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i</link>
      <description></description>
      <language>en-us</language>
      <pubDate>2024-11-13 15:44:19 UTC</pubDate>
      <lastBuildDate>2024-11-21 09:32:46 UTC</lastBuildDate>
      <webMaster>hello@padlet.com</webMaster>
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      <item>
         <title>Nhóm 1</title>
         <author>tranhoangminhthien1504</author>
         <link>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215463660</link>
         <description><![CDATA[<p>Hai điểm biểu diễn của hai góc a và -a đối xứng với nhau qua trục Ox:</p><var>sin(-a) = -sin(a)</var><var>cos(-a) = cos(a)</var><var>tan(-a) = -tan(a)</var><var>cot(-a) = -cot(a)</var>]]></description>
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         <pubDate>2024-11-13 16:04:24 UTC</pubDate>
         <guid>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215463660</guid>
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      <item>
         <title>Nhóm 2</title>
         <author></author>
         <link>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215463676</link>
         <description><![CDATA[<p> Hai điểm biểu diễn đối xứng qua trục Ox</p><p>sin (-α) = sin α<br>cos (-α) = cos α<br>tan (-α) = tan α<br>cot (-α) = cot α</p><p><br/></p>]]></description>
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         <pubDate>2024-11-13 16:04:24 UTC</pubDate>
         <guid>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215463676</guid>
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      <item>
         <title>Nhóm 2</title>
         <author></author>
         <link>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215466101</link>
         <description><![CDATA[<p>Hai điểm biểu diễn đối xứng qua gốc toạ độ.</p><p>sin (&nbsp;α + π) = - sin &nbsp;α<br>cos (&nbsp;α+ π) = - cos &nbsp;α<br>tan (&nbsp;α+ π) =&nbsp; tan &nbsp;α<br>cot (&nbsp;α + π) =&nbsp; cot &nbsp;α</p><p><br/></p>]]></description>
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         <pubDate>2024-11-13 16:06:03 UTC</pubDate>
         <guid>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215466101</guid>
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      <item>
         <title>Nhóm 2</title>
         <author></author>
         <link>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215468234</link>
         <description><![CDATA[<p>Hai điểm biểu diễn đối xứng qua trục Oy</p><p>sin (π - α) =&nbsp; sin α<br>cos (π - α) = cos α<br>tan (π - α) = tan α<br>cot (π - α) = cot α</p><p><br/></p>]]></description>
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         <pubDate>2024-11-13 16:07:15 UTC</pubDate>
         <guid>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215468234</guid>
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      <item>
         <title>Nhóm 3</title>
         <author>myloan320</author>
         <link>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215468304</link>
         <description><![CDATA[<p>Hai điểm biểu diễn đối xứng với nhau qua trục Ox:</p><p>cos(-a)=cos(a)</p><p>sin(-a)=-sin(a)</p>]]></description>
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         <pubDate>2024-11-13 16:07:18 UTC</pubDate>
         <guid>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215468304</guid>
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      <item>
         <title>Nhóm 2</title>
         <author></author>
         <link>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215470861</link>
         <description><![CDATA[<p>sin (π/2 - α) = cos α<br>cos (π/2 - α) = sin α<br>tan (π/2 - α) = cot α<br>cot (π/2 - α) = tan α</p><p><br/></p>]]></description>
         <enclosure url="" />
         <pubDate>2024-11-13 16:08:54 UTC</pubDate>
         <guid>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215470861</guid>
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      <item>
         <title>Nhóm 1</title>
         <author>tranhoangminhthien1504</author>
         <link>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215483205</link>
         <description><![CDATA[<p>Hai điểm biểu diễn của hai góc a và (a+π) đối xứng với nhau qua gốc tọa độ O:</p><var>sin(a+π) = -sin(a)</var><var>cos(a+π) = -cos(a)</var><var>tan(a+π) = tan(a)</var><var>cot(a+π) = cot(a)</var>]]></description>
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         <pubDate>2024-11-13 16:15:51 UTC</pubDate>
         <guid>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215483205</guid>
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      <item>
         <title>Nhóm 3</title>
         <author>myloan320</author>
         <link>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215486512</link>
         <description><![CDATA[<p>Hai điểm a và -a đối xứng qua O:</p><p>sin (a + π) = - sin a<br>cos (a + π) = - cos a</p>]]></description>
         <enclosure url="" />
         <pubDate>2024-11-13 16:17:41 UTC</pubDate>
         <guid>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215486512</guid>
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      <item>
         <title>Nhóm 3</title>
         <author>myloan320</author>
         <link>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215488886</link>
         <description><![CDATA[<p>Hai điểm a và π-a đối xứng nhau qua Oy:</p><p>sin (π - a) =&nbsp; sin a<br>cos (π - a) = - cos a</p><p><br/></p>]]></description>
         <enclosure url="" />
         <pubDate>2024-11-13 16:19:12 UTC</pubDate>
         <guid>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215488886</guid>
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      <item>
         <title>Nhóm 1</title>
         <author>tranhoangminhthien1504</author>
         <link>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215491133</link>
         <description><![CDATA[<p>Hai điểm biểu diễn của hai góc a và (π-a) đối xứng nhau qua trục Oy:</p><var>sin(π-a) = sin(a)</var><var>cos(π-a) = -cos(a)</var><var>tan(π-a) = -tan(a)</var><var>cot(π-a) = -cot(a)</var>]]></description>
         <enclosure url="" />
         <pubDate>2024-11-13 16:20:30 UTC</pubDate>
         <guid>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215491133</guid>
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      <item>
         <title>Nhóm 3</title>
         <author>myloan320</author>
         <link>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215492042</link>
         <description><![CDATA[<p>sin (π/2 - a) = cos a<br>cos (π/2 - a) = sin a</p>]]></description>
         <enclosure url="" />
         <pubDate>2024-11-13 16:21:01 UTC</pubDate>
         <guid>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215492042</guid>
      </item>
      <item>
         <title>Nhóm 1</title>
         <author>tranhoangminhthien1504</author>
         <link>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215500209</link>
         <description><![CDATA[<p>Hai điểm biểu diễn của hai góc a và (π/2-a) đối xứng nhau đường phân giác của góc xOy:</p><var>sin(π/2-a) = cos(a)</var><var>cos(π/2-a) = sin(a)</var><var>tan(π/2-a) = cot(a)</var><var>cot(π/2-a) = tan(a)</var>]]></description>
         <enclosure url="" />
         <pubDate>2024-11-13 16:25:58 UTC</pubDate>
         <guid>https://padlet.com/caoandy436/b0n6wncxbx3ghi6i/wish/3215500209</guid>
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