<literal>atand(1)</literal>
        <returnvalue>45</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>atan2</primary>
        </indexterm>
        <function>atan2</function> ( <parameter>y</parameter> <type>double precision</type>,
        <parameter>x</parameter> <type>double precision</type> )
        <returnvalue>double precision</returnvalue>
       </para>
       <para>
        Inverse tangent of
        <parameter>y</parameter>/<parameter>x</parameter>,
        result in radians
       </para>
       <para>
        <literal>atan2(1, 0)</literal>
        <returnvalue>1.5707963267948966</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>atan2d</primary>
        </indexterm>
        <function>atan2d</function> ( <parameter>y</parameter> <type>double precision</type>,
        <parameter>x</parameter> <type>double precision</type> )
        <returnvalue>double precision</returnvalue>
       </para>
       <para>
        Inverse tangent of
        <parameter>y</parameter>/<parameter>x</parameter>,
        result in degrees
       </para>
       <para>
        <literal>atan2d(1, 0)</literal>
        <returnvalue>90</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>cos</primary>
        </indexterm>
        <function>cos</function> ( <type>double precision</type> )
        <returnvalue>double precision</returnvalue>
       </para>
       <para>
        Cosine, argument in radians
       </para>
       <para>
        <literal>cos(0)</literal>
        <returnvalue>1</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>cosd</primary>
        </indexterm>
        <function>cosd</function> ( <type>double precision</type> )
        <returnvalue>double precision</returnvalue>
       </para>
       <para>
        Cosine, argument in degrees
       </para>
       <para>
        <literal>cosd(60)</literal>
        <returnvalue>0.5</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>cot</primary>
        </indexterm>
        <function>cot</function> ( <type>double precision</type> )
        <returnvalue>double precision</returnvalue>
       </para>
       <para>
        Cotangent, argument in radians
       </para>
       <para>
        <literal>cot(0.5)</literal>
        <returnvalue>1.830487721712452</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>cotd</primary>
        </indexterm>
        <function>cotd</function> ( <type>double precision</type> )
        <returnvalue>double precision</returnvalue>
       </para>
       <para>
        Cotangent, argument in degrees
       </para>
       <para>
        <literal>cotd(45)</literal>
        <returnvalue>1</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>sin</primary>
        </indexterm>
        <function>sin</function> ( <type>double precision</type> )
        <returnvalue>double precision</returnvalue>
       </para>
       <para>
        Sine, argument in radians
       </para>
       <para>
        <literal>sin(1)</literal>
        <returnvalue>0.8414709848078965</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>sind</primary>
        </indexterm>
        <function>sind</function>