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phamkieudung1980
2 năm trước
1. 10 cos x-24 sin 2x=13 2. Sin^2 x + căn6 cos x=3 cos^2 x+ căn2 sin x 3. 8 sin x= căn 3/ cos x + 1/ sin x 4. Cos x+ 2 cos 2x= 2 căn2 + cos 3x. Giúp mk vs ạ. Cảm ơn rất nhìu ạ.
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