GREEN VIEW PUBLIC, SCHOOL

PROJECT WORK

NAME: PRACHI NEGICLASS: 10TH DROLL NO.: 10

TRIGONOMETRIC FUNCTION(HEIGHT AND DISTANCE)

What is trigonometry?

It is a branch of mathematics that studies triangles and the relationships between there sides and the angle between

these sides.

In this topic we shall make use of

trigonometry ratios to find the height of a

tree, a tower, a water tank, a width of river, distance of ship from

lighthouse etc.

Line of sight

We observe generally that children generally look up to

see an airplane when it passes overhead. This line joining their eye to plane,

while looking up is called line of sight.

Angle of elevation

The angle which the line of sight makes with a horizontal line drawn away from their

eyes is called angle of elevation of airplane from

them.

Angle of depression

If pilot of the airplane looks downward at any object on the ground then the angle between his line of sight and

horizontal lines drawn away from his eyes is called angle of depression.

Now let us solve a problem related to height and

distance.

THANKYOU!!!oOo