K
kino_123


[TEX]1/cos3xcos^3x-sin3xsin^3x=\frac{2+3\sqrt{2}}{8}[/TEX]
[TEX]2/cos3xsin2x-cos4xsinx=\frac{1}{2}sin3x+\sqrt{1+cosx}[/TEX]
[TEX]2/cos3xsin2x-cos4xsinx=\frac{1}{2}sin3x+\sqrt{1+cosx}[/TEX]