Let z=21, calculate (z)

Let z =√6 + √6i calculate arg arg (z)

 Let z=5+7i , calculate arg arg (z)

Is the sentence true or false?

Let z=-5, then arg arg (z) = π rad

 Let z=4i, calculate arg (z)

Let z = √3 + i calculate arg arg (z)

Is the sentence true or false?

Let z=3-3√3i, then arg arg (z) = -1.04 d

 Let z=2+5i, calculate arg arg (z)

Let z = (1/3) + (i/√3), calculate arg arg (z)

Let z=7+7i, calculate arg arg (z)