Предмет: Математика, автор: kanoiyuto

1+sin4x=2cos3x*sinx
Желательно по подробнее

Ответы

Автор ответа: Holiknk
0
Это график
y=1+sin 4x
Корни
(3п/8+Пн/2;0),н€Z

y=2 cos 3x •sin x
Корни
(П/6+Пн/3;0),н€Z

kanoiyuto: Нет, тут по другому. Его правая часть это формула
Автор ответа: Nullpo201
0

1+sin4x = 2cos3x•sinx

Произведение cos на sin преобразовываем обратно в сумму

1+sin4x = 2•0.5(sin(3x+x)-sin(3x-x))

1+sin4x = sin4x - sin2x

sin2x = -1

2x = 3π/2 + 2πk

x = 3π/4 + πk, k€Z

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