Given the angle of depression = 76.4
And the length from the probe to the ship = 3,900 meters
The horizontal distance between the probe and the ship = x
So, x represents the adjacent side to the angle 76.4
The hypotenuse = 3900 m
So,
[tex]\begin{gathered} \cos 76.4=\frac{adjacent}{hypotenuse} \\ \\ \cos 76.4=\frac{x}{3900} \\ \\ x=3900\cdot\cos \text{76}.4=917.054 \end{gathered}[/tex]
rounding to the nearest meter
so, the answer is option 1). 917 meters
