<diagram dimensions="(300,300)" margins="5">
  <definition>a=1</definition>
  <definition>f(x) = exp(x/3)*cos(x)</definition>
  <coordinates bbox="[-4,-4,4,4]">
    <grid-axes xlabel="x" ylabel="y"/>

    <group at="graph-tangent">
      <graph at="graph" function='f' />
      <tangent-line at="tangent" function="f" point="a"
		    infinite="yes"/>
      <point at="point" p="(a, f(a))">
        <m>(a,f(a))</m>
      </point>
    </group>
  </coordinates>

  <annotations>
    <annotation ref="figure"
                text="The graph of a function and its tangent line at the point a equals 1">
      <annotation ref="graph-tangent" text="The graph and its tangent line">
        <annotation ref="graph" text="The graph of the function f" sonify="yes"/>
        <annotation ref="point" text="The point a comma f of a"/>
        <annotation ref="tangent" text="The tangent line to the graph of f at the point"/>
      </annotation>
    </annotation>
  </annotations>

</diagram>
  
