Toán Lớp 11: 1) sin^2 4x-cos^2 6x=sin(10,5π+10x). Tìm nghiệm thuộc (0,π/2)
2) 1+cos^3x-sin^3x=sin2x
3) 1+sin2x+cos2x/1+cot^2x=√2 sinx.sin2x
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Toán Lớp 11: 1) sin^2 4x-cos^2 6x=sin(10,5π+10x). Tìm nghiệm thuộc (0,π/2)
2) 1+cos^3x-sin^3x=sin2x
3) 1+sin2x+cos2x/1+cot^2x=√2 sinx.sin2x
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