Multiplying by j is rotation

Multiplying any real or complex number by the imaginary unit j corresponds to a rotation. This is the key feature of j that makes it such a useful number.

[curtpiazza]

Thanx for the review! The key is "rotation"! Learned a lot! 😅🎉

[abcd]

thank you sir. How can I find the complete playlist on complex numbers? I am preparing for iit jee.

[Juan_Carls]

Imaginary axis? More like Jmaginary axis amirite

[thothheartmaat]

it's artificial rotation. it's really just a weird way of multiplying by -1 over and over again.

[JJPMaster]

that’s i. you electrical engineers disgust me. unless you are john deacon.