My question: Two euclidean vectors A and B with the lengths 4 respectivly 5 creates a radius of 45⁰. How long is

a ) vector A + B
b ) vector A - B

Please explain how u get to the answer..

Answer to a is: √41+20√2
Answer to b is: √41-20√2

I cant figure out how they get those numbers!!!

This post was edited by bomben on Oct 23 2013 08:14am

I haven't had my coffee yet so maybe it is just me being a boneheaded, but I can't wrap my head around this part.

This post was edited by Azrad on Oct 23 2013 08:56am

Ok now that I've had some coffee:
I'll assume you meant, "form an angle of 45 degrees".



I'll leave the subtraction to you.

This post was edited by Azrad on Oct 23 2013 09:25am

Thanks mate