you seem to be missing information from number 2), i think you meant to state the angle of elevation, but didn't. anyway, we can still do this problem in principle. the other problems are similar, try attacking them in the same way. that is, draw diagrams and figure out what trig ratio you need to solve for the unknown. i would hope you know what is meant by "angle of elevation" and "angle of depression."

anyway, in this problem, let the angle of elevation be and the distance from the foot of the pole to the point be (see the diagram below).

we can use the tangent trig ratio here.

problem 2:

now, if we know what x is, we can find the distance. otherwise, leave it like that. try the others, be sure to draw diagrams so you know how to think about the problem