If z is purely real ; then `arg(z)=0 or pi`

If z is purely imaginary ; then arg(z)=+-(pi)/(2)

If z is purely real and Re(z) < 0, then Arg(z) is

If z is a purely imaginary number then arg (z) may be

If z is purely real number such that Re(z)<0 , then argument (z) is equal to:

If z is a purely real complex number such that "Re"(z) lt 0 , then, arg(z) is equal to

If z is a purely real complex number such that "Re"(z) lt 0 , then, arg(z) is equal to

If z is purely imaginary and Im (z) lt 0 , then arg(i bar(z)) + arg(z) is equal to

If z = (3+isintheta)/(4-icostheta) is purely real and theta in (pi/2,pi) ,then arg(sintheta + i costheta) is -