Use Identities to Fill in the Blank with the Appropriate $\sec 80^{\circ}=\frac{1}{.....10^{\circ}}$

Multiple Choice

Use identities to fill in the blank with the appropriate trigonometric function name.
- $\sec 80^{\circ}=\frac{1}{.....10^{\circ}}$

A) $\cos$
B) $\csc$
C) sec
D) $\sin$