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Correct answer
$R_{-\frac{\pi}{2}} = $
$\begin{bmatrix} 0.00 & 1.00\\ -1.00 & 0.00\\\end{bmatrix}$
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Started at:
2026-08-04 23:01:53 (CDT)
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{
"M": {
"_type": "ndarray",
"_dtype": "float64",
"_value": [
[
0,
1
],
[
-1,
0
]
]
}
}