помогите упростить!!!!sin(pi\2+a)-cos(pi-a) - №15093881

помогите упростить
!!!!sin(pi\2+a)-cos(pi-a)
- Предмет:
  Математика
- Автор:
  julius2wnt
- 6 лет назад

Ответы 1

Sin(Pi/2 + a) = cosaCos(Pi/2 - a) = sinaOtvet: cosa-sina
- Автор:
  ezra
- 6 лет назад
- 0
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Russia is my Motherland. I like it with all my heart and I'm very proud of it. It has a long and rich history. Russia has suffered a lot from foreing invaders and cruel dictators but it has never conquered. All the hictorical events are reflected in literature, arts, architecture. Russia has rick cultural traditions. Everybody in the world knows Pushkin, Tolstoy, Chekhv, Chaikovsky, Rublev and others. A lot of tourists come to Russia to get acquainted with Russian culture, to visit world-know museums such as Hermitage, Tretyakov Gallery, Russian museum and others. Russian ballet is famous all over the world.
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