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Câu 4:

Giải phương trình $\cos 2x-5\sin x-3=0$

Câu 4: Giải phương trình cos⁡2x−5sin⁡x−3=0\cos 2x-5\sin x-3=0cos2x−5sinx−3=0 ta được nghiệm là:

Thông tin câu hỏi

Câu 4:

Giải phương trình $\cos 2x-5\sin x-3=0$ ta được nghiệm là: