Recent content by pf09

haha ok my book still uses components for all the proofs. i have to leave for school now, ill try to get back to this in between classes today. thanks for your help.

thank you for these starting points. ok so after i square both sides of |A + B| = |A - B|, i get what hallsofivy gave me - (A+B).(A+B) = (A-B).(A-B). am i doing this next part right? from there, i said that (A+B).(A+B) = <(a1 + b1)^2, (a2 + b2)^2, (a3 + b3)^2> and (A-B).(A-B) = <(a1 - b1)^2...

i can add vectors, find magnitudes, do dot products, find the angle between vectors,.. i can do all that. i just don't know what this problem is asking. if someone could tell me what I'm supposed to do, i could probably do it. please, i actually dreamt about this problem between my first and...

hi, thank you for the welcome. i know that about the dot product; i just don't know how it relates. solve which equation? what am i solving for? i'm not philosophizing. i just don't know what I'm supposed to do.

Vectors A and B each lie in the x-y plane. The magnitude of A + B equals the magnitude of A - B. Find the geometric relation between vectors A and B. (Hint: Express the vectors in unit-vector notation. Use your knowledge of dot products.) I really don't even know what this problem is asking...