Question

2) The elevation of a tower at a station A due north of it is a and at a station B due west of A is B.
Prove that the height of the tower is
ABsina sinß
sin?a- sin2 B
​

Answer 1

Answer:

(cot

2

β−cot

2

α)

AB

or

(tan

2

α−tan

2

β)

ABtanαtanβ

or

(sin

2

α−sin

2

β)

ABsinαsinβ

or

[sin(α+β)sin(α−β)]

1/2

ABsinαsinβ

if sin

2

α−sin

2

β=sin(α+β)sin(α−β)