Cosine formula
[tex]\cos (angle)=\frac{\text{ adjacent side}}{\text{ hypotenuse}}[/tex]
Considering the angle of 70°, the adjacent side has a length of x units, and the hypotenuse has a length of 5 units. Substituting this information into the formula and solving for x:
[tex]\begin{gathered} \cos (70\degree)=\frac{x}{5} \\ \cos (70\degree)\cdot5=x \\ 1.7\approx x \end{gathered}[/tex]
