Problem 1 :
Find the height of a vertical cliff if the angle of elevation is 25° to the top from a point which is 235 m from the base of the cliff.
Problem 2 :
What angle will a 5 m ladder make with a wall if it reaches 4.2 m up the wall?
Problem 3 :
The angle of elevation to the top of a lighthouse 25 m above sea-level from a fishing boat is 6°. Calculate the horizontal distance of the boat from the lighthouse.
Problem 4 :
The angle of elevation from point A on horizontal ground to the top of a 20 m high pole is 35°. A rope is attached from A to the top of the pole. Find the length of the rope.
Problem 5 :
A rectangular gate has a diagonal strut of length 3 m and an angle between the diagonal and a side is 28°. Find the length of the longer side of the gate.
Problem 6 :
From a vertical cliff 80 m above sea level, a fishing boat is observed at an angle of depression of 6°. How far out to sea is the boat?
Problem 7 :
A railway line goes up an incline of constant angle 4° over a horizontal distance of 4 km. How high is it above the horizontal at the end of the incline?
Problem 8 :
At the entrance to a building there is a ramp for wheelchair access. The length of the ramp is 5 metres, and it rises to a height of 0.6 metres. Find the angle θ that the ramp makes with the ground.
Problem 9 :
The roof of a bus shelter is supported by a metal strut 2.5 m in length, attached to the back wall of the shelter at an angle of 40˚. Calculate how far below the roof of the shelter the strut is attached to the wall.
Problem 10 :
The diagram alongside shows a goalpost which has snapped in two after being hit by lightning. The top of the post is now resting 15 m from its base at an angle of 25˚. Find the height of the goal post before it snapped.
1) So, height of the vertical cliff is 109.58 m.
2) 𝜃 = 57.14°
3) So, horizontal distance of the boat from the lighthouse is 238.09 m.
4) So, length of the rope is 34.90 m.
5) So, the length of longer side is 2.646 m.
6) So, the distance of the boat to the cliff is 762 m.
7) 279 m
8) 𝜃 = 6.89°
9) 1.92 m
10) Approximately 23 m.
May 21, 24 08:51 PM
May 21, 24 08:51 AM
May 20, 24 10:45 PM