Tập nghiệm của phương trình $\sqrt{3}sinx+cosx=\frac{1}{cosx}$ thuộc $\left ( 0;2\pi\right )$ là:

Question

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4 câu trả lời

Answer 1

$\left \{ \frac{\pi }{3},\pi ,\frac{4\pi }{3} \right \}$

Answer 2

$\left \{ \frac{\pi }{3} ,\frac{4\pi }{3} \right \}$

Answer 3

$\left \{ \frac{\pi }{3},\pi\right \}$

Answer 4

$\left \{ \frac{\pi }{3},\pi ,\frac{4\pi }{3},2\pi\right \}$