Instrucciones: Responde las siguientes preguntas.

• Calcula la cofunción de \(\cos \left ( \displaystyle{\frac{2 \pi}{9}} \right )\).
  • \(\mbox{sen} \left ( \displaystyle{\frac{5 \pi}{18}} \right )\)
  • \(\sec \left ( \displaystyle{\frac{13 \pi}{18}} \right )\)
  • \(\tan \left ( \displaystyle{\frac{5 \pi}{6}} \right )\)
  • \(\csc \left ( \displaystyle{\frac{4 \pi}{9}} \right )\)

• Calcula la cofunción de \(\mbox{ctg} \left ( \displaystyle{\frac{11 \pi}{36}} \right )\).
  • \(\sec \left ( \displaystyle{\frac{17 \pi}{18}} \right )\)
  • \(\csc \left ( \displaystyle{\frac{23 \pi}{36}} \right )\)
  • \(\mbox{sen} \left ( \displaystyle{\frac{5 \pi}{18}} \right )\)
  • \(\tan \left (\displaystyle{ \frac{7 \pi}{36}} \right )\)

• Calcula la cofunción de \(\sec \left ( 66^{\circ} \right )\).
  • \(\mbox{sen} \left ( 24^{\circ} \right )\)
  • \(\csc \left ( 24^{\circ} \right )\)
  • \(\sec \left ( 24^{\circ} \right )\)
  • \(\cos \left ( 24^{\circ} \right )\)

• Calcula la cofunción de \(\mbox{sen} \left ( 60^{\circ} \right )\).
  • \(\mbox{ctg} \left ( 30^{\circ} \right )\)
  • \(\sec \left ( 30^{\circ} \right )\)
  • \(\mbox{sen} \left ( 30^{\circ} \right )\)
  • \(\cos \left ( 30^{\circ} \right )\)

• Calcula la cofunción de \(\cos \left ( 77^{\circ} \right )\).
  • \(\mbox{sen} \left ( 13^{\circ} \right )\)
  • \(\cos \left ( 13^{\circ} \right )\)
  • \(\tan \left ( 13^{\circ} \right )\)
  • \(\sec \left ( 13^{\circ} \right )\)