Question

from the edge of a cliff 180m high, the angles of depression of two boats at sea are 43° and 52° respectively what is the distance between the two angles?

Answer 1

tan 52 = 180/a; a = 180/tan 52

tan 43 = 180/b; b = 180/tan 43

you need to calculate, a-b = 180/tan 52 - 180/tan 43

substitute the value of tan thetas, and calculate it simply...