(x)/(17)=cos(239) (x)/(17)(square )=0.9716(square )

To solve thefrac{x}{17} = \cos(239) x \cos(239) \cos(239) \approx -0.7660 \frac{x}{17} = -0.7660 x x = -0.7660 \times 17 x \approx -13.022 x \approx -13.022$.