Срочно, помогите Упростить выражения: 1) 3cosa - 3cos(360°- a) + sin (90°- a)+sin(a+90°); 2) ctg(90°+a)+ctg(270°-a)+2 tga -tg(a-180°); 3) sin(a-180°)cos(a-90°)+sin(270°-a)sin(90°+a);

Срочно, помогите Упростить выражения:
1) 3cosa - 3cos(360°- a) + sin (90°- a)+sin(a+90°);
2) ctg(90°+a)+ctg(270°-a)+2 tga -tg(a-180°);
3) sin(a-180°)cos(a-90°)+sin(270°-a)sin(90°+a);
- Предмет:
  Математика
- Автор:
  rohani8xc
- 5 лет назад

Ответы 3

А есть более подробно?
- Автор:
  isiahhc7g
- 5 лет назад
- 0
Применяйте формулы приведения
- Автор:
  mangojoza
- 5 лет назад
- 0
1) 3cos(a) - 3cos(360°- a) + sin (90°- a) + sin(a+90°) = 2cos(a)2) ctg(90° + a) + ctg(270° - a)+ 2tg(a) - tg(a - 180°) = tg(a)3) sin(a - 180°)*cos(a - 90°) + sin(270° - a)*sin(90° + a) = -1
- Автор:
  crystal99
- 5 лет назад
- 0
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Срочно, помогите Упростить выражения: 1) 3cosa - 3cos(360°- a) + sin (90°- a)+sin(a+90°); 2) ctg(90°+a)+ctg(270°-a)+2 tga -tg(a-180°); 3) sin(a-180°)cos(a-90°)+sin(270°-a)sin(90°+a);

Ответы 3

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Срочно, помогите Упростить выражения:
1) 3cosa - 3cos(360°- a) + sin (90°- a)+sin(a+90°);
2) ctg(90°+a)+ctg(270°-a)+2 tga -tg(a-180°);
3) sin(a-180°)cos(a-90°)+sin(270°-a)sin(90°+a);