Please help me with the steps !i don't understand this.

Question

The working arm of a tower crane is 192m high and has a length of 71.6 m. Suppose the hook reaches the ground and moves along the arm of the trolley,
a) determine max distance from hook to operator when trolley is fully extended at 71.6 m and min distance when trolley is closest to operator at 8.1 m.Hint: operator is at vertex of crane.
b) determine max and min angles of depression from the operator to the hook on the ground.

Answer 1

(a) max: d^2 = 192^2 + 71.6^2
min: d^2 = 192^2 + 8.1^2

(a) max: tanθ = 192/8.1
min: tanθ = 192/71.6

Didja forget your Pythagorean Theorem and the definitions of the basic trig functions?