complex number question (1 Viewer)

[poptarts12345]

why is the answer c?

 

[quickoats]

This is not a complex numbers question, it is a vectors question. Consider the angle between two vectors: cos theta = (a dot b)/|a||b| and then rearrange.

 

[cormglakes]

This is not a complex numbers question, it is a vectors question. Consider the angle between two vectors: cos theta = (a dot b)/|a||b| and then rearrange.

oh that makes way more sense now... lol i was trying to do cis and all that stuff