Answer:
Horizontal component,

Step-by-step explanation:
It is given that,
Displacement of the submarine, d = 185 m
It is at an angle of 15 degrees below the horizontal. We need to find the horizontal component of the submarine's displacement. It is given by :

Substituting the values in above equation as :


So, the horizontal component of the submarine’s displacement is 178.69 meters. Hence, this is the required solution.