While cruising the Nile, you see a bank covered in crocodiles. The tour guide says the distance from the water's edge to the top of the bank is 15m, which is 6m above the water line. Using the sine rule, calculate the angle of depression a crocodile at the top of the bank will need to move at to return to the water (Round your answer to the nearest minute}
Review your sine rule. It is then clear that
sinθ = √(15^2-6^2)/15
It might have been easier to calculate using
cosθ = 6/15