Hello, my problem is as follows:(adsbygoogle = window.adsbygoogle || []).push({});

Given thatAandBare known vectors, and

[tex]A \cdot C=u[/tex] is a known quantity, and [tex]A \times C=B[/tex]

ExpressCin terms ofA,B, u, and the magnitude ofA

So far what i have done was use the definition of the dot product as AC cos [tex]\theta[/tex]=u, and cross product as AC sin [tex]\theta[/tex]=|B|, squared both and added them to get an expression for the magnitude ofCsquared, however i do not know how to get the vectorCby itself in terms of the quantities in the question, can anyone explain how i should go about this? thanks

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Dot and cross product problem

**Physics Forums | Science Articles, Homework Help, Discussion**