Q. 14.4( 23 Votes )

# Evaluate:

Answer :

We all know that i = √(-1) .

and = 1 = i (where n is any positive integer ) =  = -1

So,

(i) L.H.S = = = Since it is of the form Hence the value of .

(ii)     so its solution would be -1

(iii)   i

So, it is of the form of so the solution would be i.

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