Chapter 4 - Section 4.8 - Applications of Trigonometric Functions - Exercise Set - Page 638: 34

$923.55$ or, $924$

Here, we have $ x= \dfrac{500}{ \tan 20^{\circ}} - \dfrac{500}{ \tan 48^{\circ}}$ or, $=500( \dfrac{1}{ \tan 20^{\circ}} - \dfrac{1}{ \tan 48^{\circ}})$ or, $=500(2.7475-0.90040)$ So, $ x=923.55$ or, $924$