If `z_(1)=3i and z_(2)=-1-i` , where `i=sqrt(-1)` find the value of arg `((z_(1))/(z_(2)))`

If arg(z_(1))=(2pi)/3 and arg(z_(2))=pi/2 , then find the principal value of arg(z_(1)z_(2)) and also find the quardrant of z_(1)z_(2) .

If arg(z_(1))=(2pi)/3 and arg(z_(2))=pi/2 , then find the principal value of arg(z_(1)z_(2)) and also find the quardrant of z_(1)z_(2) .

If z_(1) = 2 - i and z_(2) = -4 + 3i, find the inverse of z_(1)z_(2) and (z_(1))/(z_(2)) .

z_(1)=9+3i and z_(2)=-2-i then find z_(1)-z_(2)

If z_(1)=-1,z_(2)=i then find Arg ((z_(1))/(z_(2)))

If z_(1)=2-i, z_(2)=1+ 2i, then find the value of the following : (i) Re((z_(1)*z_(2))/(bar(z)_(2))) (ii) Im (z_(1)*bar(z)_(2))

If z_(1)=2-i, z_(2)=1+ 2i, then find the value of the following : (i) Re((z_(1)*z_(2))/(bar(z)_(2))) (ii) Im (z_(1)*bar(z)_(2))

If z_(1)=-1 and z_(2)=-i , then find Arg (z_(1)z_(2))

If z_1 = 3i and z_2 = -1 -i , find the value of arg z_1/z_2 .