Упростите выражение: cos^2a+sin^2a-5 Решите уравнение: sinX+1=0 2cos2X=корень из 3 - №28085871

Упростите выражение: cos^2a+sin^2a-5
Решите уравнение: sinX+1=0
2cos2X=корень из 3
- Предмет:
  Математика
- Автор:
  pintoulxx
- 6 лет назад

Ответы 1

cos^2a+san^2a-5=-41)sinX+1=0sinX= -1X=270(градусів)2)2cos2X=корень из 3cos2X=корень из 3/22X=30(градусов)X=15(градусов)
- Автор:
  patterson
- 6 лет назад
- 0
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