A scuba diver located  feet below the surface of the water.

Scuba diver spots a shipwreck at an angle of depression is .

Scuba diver descending to a point feet above the ocean floor.

The angle of depression of scuba diver from feet above the ocean floor is .

Consider distance from the shipwreck to the point on the ocean floor as .

Consider distance between point feet below sea level to the point feet above the ocean floor as .

Draw a diagram using above information.

Find the depth of the shipwreck.

From the smaller right angle triangle,

The acute for the smaller right angle triangle is .

The length of opposite side is feet.

The length of adjacent side is feet.

Trigonometric function : .

From the larger right angle triangle.

The acute for the smaller right angle triangle is .

The length of opposite side is feet.

The length of adjacent side is feet.

Trigonometric function : .

Substitute the value of equation (1) in the above equation.

.

Depth of the shipwreck is feet.

Depth of the shipwreck is feet.