## Calculus 8th Edition

$x= 24.62147$ cm
Since, opp =x and adj=25 cm Thus, $tan\theta=\frac{opp}{adj}$ $tan(\frac{2\pi}{5})=\frac{x}{8 }$ Need to solve $x$. $x=tan(\frac{2\pi}{5})\times 8$ Hence, $x= 24.62147$ cm