Chapter 8.4, Problem 4CE

To determine

The value of x.

Answer to Problem 4CE

The value of x is 10

Explanation of Solution

Given information:

The given figure is,

  

Here, in the figure one angle is $60°$

And second angle is $90°$

  $\begin{array}{c}\cos \theta =\frac{base}{hypotenuse}\\ \cos 60°=\frac{5}{x}\\ \frac{1}{2}=\frac{5}{x}\\ x=10\end{array}$

Therefore, the value of x is 10