Aakanksha Mantri − Profile

sec^4A (1 - sin^4A) - 2tan^2A

= sec^4A - tan^4A - 2tan^2A

= (tan^2A + 1)^2 - tan^4A - 2tan^2A

= tan^4A + 1 + 2tan^2A - tan^4A - 2tan^A

= 1

Since, RHS = LHS; Hence proved. 

Social Forestry - It refers to the management and protection of forests and afforestation on barren land.

Agro Forestry - It refers to the sustainable system of managing a piece of land through agricultural crops and forest crops and animal rearing to ensure that the land is used most efficiently.

Source - Total Geography

An important ingredient in iron and steel smelting in blast furnaces

Jharkhand or Odisha

Magnesium Chloride - Soluble in water and undergoes fast ionic reactions

Methane - Insoluble in water and undergoes slow molecular reactions

3 Bromo Pentanone

The tendency of an atom to attract electrons towards itself in a combined state is known as electronegativity.

F > A > B > C