Tập xác định của hàm số \(y = \dfrac{{ \sin x + 1}}{{ \cos 2x - 1}} \) là?
A.\(\mathbb{R}\backslash \left\{ {k2\pi ,\,k \in \mathbb{Z}} \right\}.\)
B.\(\mathbb{R}\backslash \left\{ {k\pi ,\,k \in \mathbb{Z}} \right\}.\)
C.\(\mathbb{R}\backslash \left\{ {\dfrac{\pi }{2} + k\pi ,\,k \in \mathbb{Z}} \right\}.\)
D.\(\mathbb{R}\backslash \left\{ {k\dfrac{\pi }{2},\,k \in \mathbb{Z}} \right\}.\)
A.\(\mathbb{R}\backslash \left\{ {k2\pi ,\,k \in \mathbb{Z}} \right\}.\)
B.\(\mathbb{R}\backslash \left\{ {k\pi ,\,k \in \mathbb{Z}} \right\}.\)
C.\(\mathbb{R}\backslash \left\{ {\dfrac{\pi }{2} + k\pi ,\,k \in \mathbb{Z}} \right\}.\)
D.\(\mathbb{R}\backslash \left\{ {k\dfrac{\pi }{2},\,k \in \mathbb{Z}} \right\}.\)
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Hóa Học lớp 12
