${\cos\left({1}\right)}^{-1}$
Any expression raised to the power of $-1$ equals its reciprocal$\frac{ 1 }{ \cos\left({1}\right) }$
Use $\frac{ 1 }{ \cos\left({t}\right) }=\sec\left({t}\right)$ to transform the expression$\begin{align*}&\sec\left({1}\right) \\&\approx1.85082\end{align*}$