01.04.2022

Разложить на множителиsin2a – 2sina;sina+sin a/2cosa–sin2a1–sin2a–cos²a

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Алгебра

Вопрос школьника по предмету Алгебра

Разложить на множители
sin2a – 2sina;
sina+sin a/2
cosa–sin2a
1–sin2a–cos²a

Ответ учителя по предмету Алгебра

Ответ:

2 * sin a * (cos a — 1)

Пояснення:

sin 2a — 2*sin a = 2 * sin a * cos a — 2 * sin a = 2 * sin a * (cos a — 1)

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