Преобразовать в произведение следующие выражения: [tex]sin\frac{2\pi }{9}+sin\frac{\pi }{9} -2cos\frac{\pi }{18}[/tex]
[tex]\frac{\sqrt{2}-cosx-sinx }{sinx-cosx}[/tex]
3-4cos4x+cos8x-8cos^4*2x
Ответы:
1.[tex]-cos\frac{\pi }{18}[/tex]
2.[tex]tg(\frac{x}{2}-\frac{\pi }{8})[/tex]
3.-8cos4x
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