Question

Find the value of each variable. Round decimals to the nearest tenth.

Answer 1

Cosine formula

`\cos (angle)=\frac{\text{ adjacent side}}{\text{ hypotenuse}}`

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:

`\begin{gathered} \cos (70\degree)=(x)/(5) \\ \cos (70\degree)\cdot5=x \\ 1.7\approx x \end{gathered}`