Solution:
To find cos I, applying the cosine formula below
[tex]\cos\theta=\frac{Adjacent}{Hypotenuse}[/tex]
Where
[tex]\begin{gathered} Adjacent=IJ=18\text{ units} \\ Hypotenuse=IK=22\text{ units} \\ \theta=I \end{gathered}[/tex]
Substitute the values of the variables
[tex]\begin{gathered} \cos I=\frac{18}{22} \\ \cos I=0.82\text{ \lparen nearest hundredth\rparen}^{\:} \end{gathered}[/tex]
Hence, the answer is 0.82 (nearest hundredth)
