1+sqrt 2 sin a помогите - №29309471

1+sqrt 2 sin a помогите
- Предмет:
  Математика
- Автор:
  gracie8l4y
- 5 лет назад

Ответы 1

$1+\sqrt2\, sina=\sqrt2\cdot (\frac{1}{\sqrt2}+sina)=\sqrt2\cdot (sin\frac{\pi }{4}+sina)=\\\\=\sqrt2\cdot 2\, sin(\frac{\pi }{8}+\frac{a}{2})\cdot cos(\frac{\pi}{8}-\frac{a}{2})$
- Автор:
  aimeev4yw
- 5 лет назад
- 0
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