Q. 55.0( 4 Votes )

# In the figure, AB

Answer :

(i) From the diagram, it is clear that the angle of elevation of A with respect to C is 30˚ where BC becomes the horizontal.

(ii) DC is a vertical line drawn from A so that we get a reference line from which we can measure the depression angle.

As AD and BC are both vertical lines therefore they are parallel.

Now ∠ACB = ∠CAD as they are alternate angles along two parallel lines

therefore, ∠ CAD = 60˚

Now, from the diagram drawn before we can easily say that

The angle of depression of C at A is 60˚

(iii)

BC = 8√3m

Now,

or,

AC = 16m.

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