# Cross Product of 2d Vectors

Printable View

• Nov 4th 2009, 08:56 AM
magdaddy101
Cross Product of 2d Vectors
If u=<0,1> and v=<e,pi> are 2d vectors, then how do I evaluate the cross product u X v?
• Nov 4th 2009, 10:08 AM
Plato
Quote:

Originally Posted by magdaddy101
If u=<0,1> and v=<e,pi> are 2d vectors, then how do I evaluate the cross product u X v?

For 2d vectors the cross product is a determinant.
If $u=~\&~v=$ then $
u \times v = \left| {\begin{array}{rr}
{u_x } & {u_y } \\
{v_x } & {v_y } \\

\end{array} } \right| = u_x v_y - u_y v_x$