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Q.

If for any 2 complex nos. z1 and z2z21z1iz2=z2z1+iz1z2, then which of the following options are correct

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a

z¯1z2+1=0

b

z1+z2=0

c

argz1z2=π

d

argz1z2=π2

answer is A, B, C.

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Detailed Solution

z11z2=z2i1+z1z1z2=
purely imaginary z1z2=purely real (negative)
z1z2+z1z2¯=0 Also z1iz2=z2z2¯z1+iz1z1¯z21iz1z2z1iz2=0z¯1z2=1 or z1z2=1

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