If `|z_(1)-z_(2)|= |z_(1)|- |z_(2)|` then prove that arg `(z_(1))= " arg" (z_(2))`

If z_(1) and z_(2) are two non-zero complex numbers such that |z_(1) + z_(2)| = |z_(1)| + |z_(2)| , then arg ((z_(1))/(z_(2))) is equal to a)0 b) -pi c) -(pi)/(2) d) (pi)/(2)

If |z_(1) + z_(2)|=|z_(1)-z_(2)| , then the difference in the amplitudes of z_(1) and z_(2) is

Let z_(1) and z_(2) be complex numbers satisfying |z_(1)|=|z_(2)|=2 and |z_(1)+z_(2)|=3 . Then |(1)/(z_(1))+(1)/(z_(2))|=

If z_(1), z_(2), z_(3) are three complex numbers and A= |("arg"z_(1),"arg"z_(2),"arg"z_(3)),("arg"z_(2),"arg"z_(3),"arg"z_(1)),("arg"z_(3),"arg"z_(1),"arg"z_(2))| then A is divisible by

If z_(1) and z_(2) are complex numbers such that z_(1) ne z_(2) and |z_(1)|= |z_(2)| . If z_(1) has positive real part and z_(2) has negative imaginary part, then ((z_(1) +z_(2)))/((z_(1)-z_(2))) may be

If arg (bar(z)_(1))= "arg" (z_(2)), (z ne 0) then

If z_(1) and z_(2) are two complex numbers satisfying the equation |(z_(1) + iz_(2))/(z_(1)-iz_(2))|=1 , then (z_(1))/(z_(2)) is

If (pi)/(3) and (pi)/(4) are argument of z_(1) and bar(z)_(2) then the value of arg (z_(1)z_(2)) is