Trigonometry

The shadow of the tower standing on level ground is found to be 40m longer when the suns altitude is 30degree than when it is 60 degree. Find the height of the tower?

2root 3

20root 3

40root3

When a point is observed the angle formed by the line of sight, were the point being viewed above the horizontal plane is know as a _______

Angle of depression

Obtuse angle

Angle of elevation

Straight line

When we lower our hand to look at the object the angle formed by the line of sight with the horizontal is known as _______

Angle of elevation

Angle of depression

If the height of the tower and the distance of the point of observation from its foot, both, are increased by 10% the angle of elevation of its top

Increases

Have no relation

Decreases

Remains unchanged

If angle of depression of a object from a 75 m high tower is 30, then the distance of object from the tower is ___

75root 3

85root3

85root 2

75root 2

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