1.
Let ZZ and WW be complex numbers such that ∣Z∣=∣W∣|Z| = |W|, and arg⁡Z\arg Z denotes the principal argument of ZZ.
Statement 1: If arg⁡Z+arg⁡W=π\arg Z + \arg W = \pi, then Z=−WˉZ = -\bar{W}.
Statement 2: ∣Z∣=∣W∣|Z| = |W|, implies arg⁡Z−arg⁡W=π\arg Z - \arg W = \pi.