Make your diagram to see that you have a right-angled triangle
with a base angle of 30° and opposite side of 20 m.
you want the adjacent, so clearly the tangent ratio is needed
tan 30° = 20/x
x = 20/tan30° = ??? m
From the top of a tower the angle of depression of a boat is 30degree if the tower is 20m height,how far is the boat from the foot of the tower
1 answer