Compute both compositions F G and G F of the following affine functions on R2.

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Compute both compositions F ○ G and G ○ F of the following affine functions on R2. Which pairs commute?
(a) F = counterclockwise rotation around the origin by 45°; G = translation in the y direction by 3 units.
(b) F = counterclockwise rotation around the point (1, 1)T by 30°; G = counterclockwise rotation around the point (-2, l)T by 90°.
(c) F = reflection through the line y = x + 1; G = rotation around (1, 1)T by 180°.
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Applied Linear Algebra

ISBN: 978-0131473829

1st edition

Authors: Peter J. Olver, Cheri Shakiban

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