Hàm số $y=\sqrt{\frac{1-cosx}{1-sinx}}$ và $k\in \mathbb{Z}$ có tâ

Question

Cơ bản

Hàm số $y=\sqrt{\frac{1-cosx}{1-sinx}}$ và $k\in \mathbb{Z}$ có tập xác định là

4 câu trả lời

Answer 1

$\mathbb{R}\setminus \left \{k\frac{\pi }{2} ,k\in \mathbb{Z} \right \}$

Answer 2

$\mathbb{R}\setminus \left \{\frac{\pi }{2}+k\pi ,k\in \mathbb{Z} \right \}$

Answer 3

$\mathbb{R}\setminus \left \{\frac{\pi }{2}+k\pi ,k\in \mathbb{Z} \right \}$

Answer 4

$\mathbb{R}\setminus \left \{ k\pi ,k\in \mathbb{Z} \right \}$