Question

class 12th rainbow chapter 1 water by c.v Raman summary​

Answer 1

Answer:

Hope you are

Explanation:

sin(theta) = a / c. csc(theta) = 1 / sin(theta) = c / a. cos(theta) = b / c. sec(theta) = 1 / cos(theta) = c / b. tan(theta) = sin(theta) / cos(theta) = a / ... ·

Answer 2

$\huge\colorbox{yellow}{Summary:-}$

• Water is elixir of life. Water separates the Libyan desert from the valley of the Nile in Egypt. On one side, there is only sand, desert and there is no life. On the other side, all l the areas are full of life, green plants, must fertile lands, more population and vegetation.

• Water adds to the beauty of the countryside. A little stream, a little pond and the rain fed tanks in countryside look very beautiful. One can enjoy looking upon the sun rising or setting over them. Water in a landscape may be compared to the eyes in a human face.

• The successive steps in the process of soil erosion are the flow of water, heavy rains, slope of the land and la of vegetation. Our precious soil is washed away every year. So the measures suggested to check soil erosion are terracing of land, the construction of bunds to check the flow of water, the practice of contour cultivation and planting of vegetation.

• Water is the basis of life. It is essential part for every animal and every plant. Water is necessary for animal life and moisture in the soil for the life and growth of plants and trees. No life is possible without water. It is also must for agriculture. Thus the conservation and utilization of water is fundamental for human welfare. Much of Indian agriculture depends on seasonal rainfall. In case of fail of rainy season means failure of agriculture. If water is conserved /saved, it will prove very valuable for irrigation and power production. Conserved water will help in irrigation and the electricity produced by water will also help in irrigation.

• The conservation and utilization of water is thus necessary for our country. We should collect rain water and use it because rain water is 100% pure. We should not throw Waste material into water sources. The farmer should use modern methods to save water.

• Conservation of water is necessary to keep life going during the period when there is very little or no rainfall vast areas of scrub/desert land can be turned in to fertile fields l with proper use of water.

• In short, life on the earth cannot be imagined without water. It plays on important rale in the life of all.