Complex NumbersHard
Question
sin-1 
, where z is nonreal, can be the angle of a triangle if
, where z is nonreal, can be the angle of a triangle if Options
A.Re(z) = 1, Im(z) = 2
B.Re(z) = 1, 0 < Im (z) ≤ 1
C.Re(z) + Im(z) = 0
D.none of these
Solution
sin-1 
should exists and must be positive
x = 1 0 < y ≤ 1
should exists and must be positivex = 1 0 < y ≤ 1
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