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sin(A+B) = sinAcosB+cosAsinB sin(A–B) = sinAcosB – cosAsinB 
=2+1 =3
Manganite is an ore/mineral of
Formation of ozone hole is maximum over
The gas usually causing explosions in coal mines is-
Bronze is an alloy of-
The most reactive among the halogens is-
The noble gas used in radiotherapy is
Which of the following is a physical change?
_________is the process in which acids and bases react to form salts and water.
Milk tastes sour when kept in the open for sometimes due to the formation of-
The noble gas used in radiotherapy is
