\(cos2x-cos6x+4\left(3sinx-4sin^3x+1\right)=0\) \(sin^2x-2sinx+2=sin^23x\) \(sinx+cosx=\sqrt{2}\left(2-sin^32x\right)\) \(\left(cos4x-cos2x\right)^2=5+sin3x\) \(\sqrt{5+sin^23x}=sinx+2cosx\) \(sinx-2sin2x-3sin3x=2\sqrt{2}\) ...
Đọc tiếp
\(cos2x-cos6x+4\left(3sinx-4sin^3x+1\right)=0\)
\(sin^2x-2sinx+2=sin^23x\)
\(sinx+cosx=\sqrt{2}\left(2-sin^32x\right)\)
\(\left(cos4x-cos2x\right)^2=5+sin3x\)
\(\sqrt{5+sin^23x}=sinx+2cosx\)
\(sinx-2sin2x-3sin3x=2\sqrt{2}\)
\(tanx+cotx=2sin\left(x+\frac{\pi}{4}\right)\)
