Question

why it is 90-ø? I dont have the basic. what i have to study to understand the basic of this question?
(the problem was- The angle of elevation of the top of a tower from the point P and Q at distance of m² and n² respectively from the base of the tower and in the same straight line with it are complementary. The height of the tower is​

Answer 1

Answer:

In the question it said the angles on the ground are Complementary which means

∅ + (some angle) = 90°

(some angle) = 90° - ∅

You are studying trig it means its so below your level