1.

Statement-I :If x_n=cos(pi//2^n)+isin (pi//2^n) then x_1.x_2.x_3…..=-1Statement-II : x_n=cos(pi//4^n)+isin(pi//4^n) then x_1.x_2.x_3…..infty=-1

Answer»

Only I is true
Only II is true
Both I and II are true
Neither I nor II are true

Answer :A


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