[" 9.What are the angles of depression of the object at "],[" E from the observation point "A" ,if "AD=ED?],[qquad " A "]

In fig what is the angle of elevation of point A from C and angle of depression of point D from A?

What change will be observed in the angle of elevation as we move away from the object?

If the angle of elevation of the top of a Monument when observed form a point on the roof of a five storied building of 18 metre height is 45^@ and the angle of depression of the foot of the Monument, when observed from the same point 60^@ . What is the height of the MOnument?

If the angle of elevation of the top and Monument when observed from a point on the roof of a building of 16 metre height is 60^@ and the angle of depression of the foot of the Monument, when observed from the same point is 30^@ , calculate the height of the Monument and the distance from Monument to the building.

In Fig. 12.58, what are the angles of depression from the observing positions O_1 and O_2 of the object at A ? (FIGURE)

In Fig.12.58, what are the angles of depression from the observing positions O_(1) and O_(2) of the object at A?( FIGURE)

A man observes that when he moves up a distance c metres on a slope, the angle of depression of a point on the horizontal plane from the base of the slope is 30^0, and when he moves up further a distance c metres, the angle of depression of that point is 45^0dot The angle of inclination of the slope with the horizontal is.

A man observes that when he moves up a distance c metres on a slope, the angle of depression of a point on the horizontal plane from the base of the slope is 30^0, and when he moves up further a distance c metres, the angle of depression of that point is 45^0dot The angle of inclination of the slope with the horizontal is.

A man observes that when he moves up a distance c metres on a slope, the angle of depression of a point on the horizontal plane from the base of the slope is 30^0, and when he moves up further a distance c metres, the angle of depression of that point is 45^0dot The angle of inclination of the slope with the horizontal is.

A man observes that when he moves up a distance c metres on a slope, the angle of depression of a point on the horizontal plane from the base of the slope is 30^0, and when he moves up further a distance c metres, the angle of depression of that point is 45^0dot The angle of inclination of the slope with the horizontal is.