These require extra steps . . . Here is #1 . . .
1. A cell tower 25m tall is on top of a hill.
To an observer standing on level ground near the foot of the hill,
the angle of elevation of the top of the tower is 50°
and the angle of elevation of the bottom of the tower is 32°.
Calculate the height of the top of the tower from the observer's position on the ground.
* * C
* 18° * :
* * :y
* * 32° :
A * - - - - - - - - - - - * D
is the 25-foot tower.
The observer is at
. . .
. . We want:
In right triangle 
In right triangle
Equate  and : .