Hàm số $y=\frac{sinx}{cos\left ( 3x+\frac{\pi }{4} \right )}$

Question

Cơ bản

4 câu trả lời

Answer 1

A.

$\mathbb{R}$

Answer 2

$\mathbb{R}\setminus \left \{ \frac{\pi }{12}+k\frac{\pi }{3};k\in \mathbb{Z} \right \}$

Answer 3

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

Answer 4

$\mathbb{R}\setminus \left \{ \frac{k\pi }{3};k\in \mathbb{Z} \right \}$