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blhhblah
Jul13-08, 11:33 PM
Hi, I'm having some difficulty with this problem. I need to project a point in R2 to the line x2 = x1 (sqrt(3)) and then rotate it 30 degrees clockwise.

I believe the 2x2 matrix to map it is just

sqrt(3) 0
0 1

and to rotate a vector clockwise as opposed to counter clockwise I think is

cosx sinx
-sinx cosx

I could be wrong about these 2 matrices. Is there anyway to merge the two? Do I multiply them? Thanks.

HallsofIvy
Jul14-08, 06:34 AM
Yes, you "merge" two matrices by multiplying them. Be sure to multiply in the right order.