#### From the top of a building 20 m high, the angle of elevation of the top of a monument is 45° and the angle of depression of its foot is 15°. Find the height of the monument.

**Solution:**

Let AB be the building and AB = 20 m and

let CD be the monument and let CD = x

The distance between the building and the monument be y,

#### The angle of elevation of the top of an unfinished tower at a point distant 120 m from its base is 45°. How much higher must the tower be raised so that its angle of elevation at the same point may be 60°?

**Solution:**

Let AB be the unfinished tower and AB = 120 m

and angle of elevation = 45°

Let x be higher raised so that

the angle of elevation becomes 60°

**More Solutions:**