Prob: if tan (x)= a/b then find { a sin (2X) + b cos (2X) } Sol: when tan (x) = a/b ( opp side is 'a' units and adj side is 'b' units ) then sin x = a/√a²+b² and cos x= b/√a²+b²...
You can easily remember the Periodic table by remembering some Hindi Mnemonics Group 1 is known as alkali metals. It includes Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Ru), Caesium (Cs), and...