Question

Prove that | z - 1 | <= | |z| - 1 | + | z | | arg(z) |

Answer 1

Step-by-step explanation:

The following substitution is written:

z=|z|eiφ

... and the assignment goes on to do some transformations, operations that are trivial with this and then comes to the conclusion, which is unclear to me that:

|sinφ2|<|φ|2