Modulus Argument Question (1 Viewer)

[kaz1]

This is from the Cambridge book ex 2.2 9(c). Unfortunately there isn't an answer.

z has a modulus r and argument @. Find in terms of r and @ the modulus and one argument of iz.

I got |z|=r and Arg= pi-@, can anyone clarify this?

 

[Templar]

Since multiplying by i is equivalent of rotating anticlockwise by pi/2, the argument should become pi/2+@.

 

[kaz1]

Since multiplying by i is equivalent of rotating anticlockwise by pi/2, the argument should become pi/2+@.

Thanks.