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?

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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?

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For 2d vectors the cross product is a determinant.
If then