Hello, dojo!

Sorry, I don't understand the problem.

Some information is missing . . .

The points lie in a straight line with: .

. . Is line AC horizontal?

A vertical tower is of height and its base

lies in the same horizontal plane as , but.Really?not on the line

The angle of elevation of from are , resp.

(i) Prove that: . . . . . equalsWHAT?

Assuming is horizontal, this is all I get:

Code:H o **| * * * | * * * |h * * * | * * * | * * * *O * * α * β α * o - - - o - - - - - - - - - - - o A x B 2x C