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Mathematics, 05.07.2021 15:50 sarachristene1777

A. Trong mặt phẳngOxy , phép quay mỗi vector quanh gốc tọa độ một góc α ngược

chiều kim đồng hồ là một ánh xạ tuyến tính

(Hình 1). Hãy tìm ma trận biểu diễn và biểu

thức của phép quay trên.

Ap dụng: Cho tam giác MNP gồm các

đỉnh (1,1) M , (1,2) N , (3,3) P hãy tìm ảnh của

tam giác MNP qua phép quay nói trên, biết

góc quay là / 4 α = π và vẽ hình biểu diễn.

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A. Trong mặt phẳngOxy , phép quay mỗi vector quanh gốc tọa độ một góc α ngược

chiều kim...

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