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Lchan1
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Homework Statement
Given the matrix A=
-1/2 root(3)/2
root(3)/2 1/2
determine if the matrix is a rotation about the origin or a reflection about the positive x axis
and find the angle between the that the line makes with the x-axis
Homework Equations
The Attempt at a Solution
I found the det(A)=-1 can I concluded that the matrix reflects vectors?
and also how do you find the angle?
I tried doing projection onto the axis. but didnt get me anywhere
please help..