✨ Best Answer ✨
鏡射矩陣的公式
[ cos2θ sin2θ ]
[ sin2θ -cos2θ ]
先找
[ c s ]
[ s -c ]
形式的矩陣
只有 (1)(2)(4) 符合
再來 c 和 s 要滿足平方關係
c² + s² = cos²2θ + sin²2θ = 1
只有 (2)(4) 符合
Mathematics
Senior High
Resolved
問這題！
2.下列所代表之平面變換,哪些代表鏡射?(多選)
單元14 矩陣 335
3
2
-3
(2)
5
12
0
(4)
13
13
(5)
12
5
(進階觀念補充:二階行列式的平面變換 - 旋轉矩陣、鏡射矩陣,請配合「主題5_範例12」)
答: (2)(4)
5
13
13
Answers
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