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Mathematics
OpenStudy (anonymous):

The x'y'-coordinate system has been rotated θ degrees from the xy-coordinate system. The coordinates of a point in the xy-coordinate system are given. Find the coordinates of the point in the rotated system. Round to three decimal places, if necessary. θ=60 degrees, (1,0)

OpenStudy (anonymous):

My choices are (-0.866,0.5) (0.5),-0.866) (-0.5, 0.866) (0.866, -0.5) (0.5, 0.866)

OpenStudy (accessdenied):

Here's what the rotation of the axes actually 'means' geometrically: |dw:1338086464347:dw|

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