Упростите выражение: [tex]cos7 \alpha + cos6 \alpha + cos2 \alpha + cos \alpha

Упростите выражение:
[tex]cos7 \alpha + cos6 \alpha + cos2 \alpha + cos \alpha [/tex]

Варианты ответов: A)[tex]8cos \frac{ \alpha }{2}sin \frac{5 \alpha }{2}cos4 \alpha [/tex]
B)[tex]2cos^2 \alpha*sin^2 \alpha C) cos \alpha*sin \alpha D) 4cos \frac{ \alpha }{2}*cos \frac{5 \alpha }{2} *cos4 \alpha [/tex]
- Предмет:
  Алгебра
- Автор:
  marisol1ehb
- 5 лет назад

Ответы 1

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- Автор:
  aidanrivera
- 5 лет назад
- 0
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