09. (IFAL - adaptada) Sabemos que a matriz R, definida por COS a- sen aR=é chamada de matriz de rotação,
09. (IFAL - adaptada) Sabemos que a matriz R, definida porCOS a
- sen a
R=
é chamada de matriz de rotação, por rotacionar
de um ângulo a um vetor qualquer. Podemos dizer que,
para todo a, det R vale:
(A) O determinante varia conforme o ângulo varia.
(B) 1.
(C) -1.
(D) 0.
(E) 2.
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