Tìm tập xác định của hàm số \(y = \frac{{\tan 2x}}{{1 - \tan \,x}}\).
A.\(R{\rm{\backslash }}\left\{ {\left. {\frac{\pi }{4} + k\pi } \right|k \in Z} \right\}\).
B. \(R{\rm{\backslash }}\left\{ {\left. {\frac{\pi }{4} + k\frac{\pi }{2},\,\frac{\pi }{2} + k\pi } \right|k \in Z} \right\}\).
C. \(R{\rm{\backslash }}\left\{ {\left. {\frac{\pi }{2} + k\pi } \right|k \in Z} \right\}\).
D. \(R{\rm{\backslash }}\left\{ {\left. {\frac{\pi }{4} + k\pi ,\,\frac{\pi }{2} + k\pi } \right|k \in Z} \right\}\).
A.\(R{\rm{\backslash }}\left\{ {\left. {\frac{\pi }{4} + k\pi } \right|k \in Z} \right\}\).
B. \(R{\rm{\backslash }}\left\{ {\left. {\frac{\pi }{4} + k\frac{\pi }{2},\,\frac{\pi }{2} + k\pi } \right|k \in Z} \right\}\).
C. \(R{\rm{\backslash }}\left\{ {\left. {\frac{\pi }{2} + k\pi } \right|k \in Z} \right\}\).
D. \(R{\rm{\backslash }}\left\{ {\left. {\frac{\pi }{4} + k\pi ,\,\frac{\pi }{2} + k\pi } \right|k \in Z} \right\}\).
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Hóa Học lớp 12
