(adsbygoogle = window.adsbygoogle || []).push({}); A little concept problem with those vectors :)

Ok, so I got two objects which somehow interacts to each other, or I have two electomagnetic waves which interact in that same way.

I know the angle between those two vectors, and I know lets say the result vector of that impact, the module of this isn't important for me(!), and I also know that if f,g are two vectors

f+g=sqrt(f^2+g^2+2*f*g*cos(angle_between_them)).

BUT THIS FORMULA ONLY GIVES ME THE MODULE OF THE RESULT VECTOR.

So if I know, or I need to know whereto the result is pointing, how do I proceed.

If The Above Stantment ^^^ Are a missunderstuding of a primary concept, I wouldn't be surprise :), also excuse my kinda bad english, I might have done some mistaqes up there :).

Thx!

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# Homework Help: A little concept problem with those vectors

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