There are many real-life examples where trigonometry is used broadly.
If we have been given with height of the building and the angle formed when an object is seen from the top of the building, then the distance between object and bottom of the building can be determined by using the tangent function, such as tan of angle is equal to the ratio of the height of the building and the distance. Let us say the angle is ∝, then
Tan ∝ = Height/Distance between object & building
Distance = Height/Tan ∝
Let us assume that height is 20m and the angle formed is 45 degrees, then
Distance = 20/Tan 45°
Since, tan 45° = 1
So, Distance = 20 m