Предмет: Алгебра, автор: katyar2307

Функцію задано формулою
f(x) = sin 5x• cos3x —sin3x • cos5x

1) Знайдіть нулі функції f(x).
2) Знайдіть кількість нулів функції f(x) , які належать проміжку [0,π].

Ответы

Автор ответа: fenix6810
2

f(x) = sin 5x• cos3x —sin3x • cos5x

1) Знайдіть нулі функції f(x).

2) Знайдіть кількість нулів функції f(x) , які належать проміжку [0,π].

f(x) = sin 5x• cos3x —sin3x • cos5x=sin(5x-3x)=sin2x

sin2x=0

2x=Пk

x=Пk/2  {0; П/2; П} [0;П]


katyar2307: я додала ще одне питання подивись
katyar2307: розв'яжіть рівняння
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