Question

The angle of depression from a boat to a fish swimming inside the lake is 60°.

The fish is 17√3 m below the surface.

How far is the fish from the boat?

Answer 1

Using pythagoras,
Hypotenuse is h which is given.
h = 17 sqrt3

Cos60 = b/h , here b = base represents distance between fish and boat.

1/2 = b/17sqrt3
b = 8.5sqrt3

We can also put sqrt3 value to get exact value to the decimal.