AQA A-Level Further Maths D16-20 Transformations: Rotations

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Isn’t the rotation matrix -sin(x) in the top right corner of the matrix not the bottom left, but that then messes up the results which are actually correct.

tomh
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With topics like this and also the conic sections, are there not issues with them becoming/being one-to-many relationships when rotated? I haven't seen any mention of having to restrict the domain for conics in practice questions, but restricting the domain was mentioned in A-Level Maths

PS. Thankyou so much for your continued work on these videos, they're incredibly helpful.

jordanw