Write in Terms of the Cofunction of a Complementary Angle $$\cos \frac { \pi } { 20 }$$

Multiple Choice

Write in terms of the cofunction of a complementary angle.
- $$\cos \frac { \pi } { 20 }$$

A) $\sin \frac { 19 \pi } { 20 }$

B) $\sec \frac { 19 \pi } { 20 }$

C) $\sin \frac { 9 \pi } { 20 }$

D) $\sec \frac { 9 \pi } { 20 }$