"If "x_(r)=cos((pi)/(2^(r)))+i sin((pi)/(2^(r)))," then ""the value of "x_(1)x_(2)x_(3)...oo_(1)

If x_(r)=cos((pi)/(2^(r)))+i sin((pi)/(2^(r))), then the value of x_(1)x_(2)x_(3).........oo is :

If x_(r)=cos[(pi)/(2^(r))]+iota sin[(pi)/(2^(r))] then,prove that x_(1)*x_(2)*x_(3)...oo=-1

If x_(r)=cos((pi)/(2^(r)))+i sin((pi)/(2^(r))) then x_(1),x_(2),x_(3),....oo

If X_(r ) = cos ((pi)/(2^(r ))) + i sin ((pi)/(2^(r ))) then x_(1), x_(2)…. X_(infty) is

If x_(n)=cos((pi)/(4^(n)))+i sin ((pi)/(4^(n))) , then x_(1), x_(2), x_(3)....oo is equal to

If x_(n)=cos((pi)/(4^(n)))+i sin((pi)/(4^(n))), then x_(1)*x_(2),x_(3)...............oo

If z _(r) = cos ((pi)/(2 ^(r))) + i sin ((pi )/( 2 ^(r))), then z _(1) . z _(2). z _(3)... upto oo equals : a)-3 b)-2 c)-1 d)0

If x_(r)=cos. (pi)/(2^(r))+ isin. (pi)/(2^(r)) , then x_(1)x_(2)x_(3)....oo=

If z_(r)=cos((pi)/(3^(r)))+i sin((pi)/(3^(r))),r=1,2,3 prove that z_(1)z_(2)z_(3)z_(oo)=i