Let z be a complex number. Then angle between vectors z and - iz is

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4-1.Complex numbers

easy

Let $z$ be a complex number. Then the angle between vectors $z$ and $ - iz$ is

A

$\pi $

B

$0$

C

$ - \frac{\pi }{2}$

D

None of these

Solution

(c) Since the multiplication of a complex number by $ – i$ rotates through it by a right angle in negative (clockwise) direction.

Standard 11

Mathematics

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