Cos 2A OS 2

Cos2A OS 2

Which group elements of first transition series has the highest paramagnetism in elemental form of +1 O.S, +2 O.S. and +3 O.S.(O.S.= Oxidation state) respectively ?

In s - and p -block elements the OS . changes in 2 units, but in transition elements it changes it chnages in units of one.(T/F)

In Delta ABC prove that (i)a=b cos C+os B(ii)b=os A+a cos C(iii)c=a cos B+b cos A

In any ABC prove that a cos A+b cos B+os C=(8^(2))/(abc)

In a ABC, prove the following :a cos A+b cos B+ os C=2b sin As in C

A balloon os mass 2 KG is rising up with an acceleration of 4m/s^2 . The upward force acting on the balloon is (g = 10 ms^-2)