Originally Posted by

**adam21** The figure shows a vector, a, in the xy plane and a vector, b, in the direction of k.

Their lengths are /a\ = 3 and /b\ = 2.

find /a x b\ (cross product)

My explanation of the figure:

The figure is such that b is <0,0,2> and the angle of a to the positive y axis is about 30degrees

I am totally stuck because i need the coordinates of a, to cross it with b? b is right on the pos x axis so obviously it must be <0,0,2> but all i know about a is its magnitude and I can only approximates its angle to the y axis.

Any hints or help is really appreciated!