(x+2)•sinx (уравнение)

Найду корень уравнения: (x+2)•sinx

Вы ввели

(x + 2)*sin(x) = 0

$$\left(x + 2\right) \sin{\left(x \right)} = 0$$

Подробное решение

Дано уравнение
$$\left(x + 2\right) \sin{\left(x \right)} = 0$$
преобразуем
$$\left(x + 2\right) \sin{\left(x \right)} = 0$$
$$\left(x + 2\right) \sin{\left(x \right)} = 0$$
Сделаем замену
$$w = \sin{\left(x \right)}$$
Раскрываем скобочки в левой части ур-ния

wx+2 = 0

Разделим обе части ур-ния на 2 + x

w = 0 / (2 + x)

Получим ответ: w = 0
делаем обратную замену
$$\sin{\left(x \right)} = w$$
Дано уравнение
$$\sin{\left(x \right)} = w$$
- это простейшее тригонометрическое ур-ние
Это ур-ние преобразуется в
$$x = 2 \pi n + \operatorname{asin}{\left(w \right)}$$
$$x = 2 \pi n - \operatorname{asin}{\left(w \right)} + \pi$$
Или
$$x = 2 \pi n + \operatorname{asin}{\left(w \right)}$$
$$x = 2 \pi n - \operatorname{asin}{\left(w \right)} + \pi$$
, где n - любое целое число
подставляем w:
$$x_{1} = 2 \pi n + \operatorname{asin}{\left(w_{1} \right)}$$
$$x_{1} = 2 \pi n + \operatorname{asin}{\left(0 \right)}$$
$$x_{1} = 2 \pi n$$
$$x_{2} = 2 \pi n - \operatorname{asin}{\left(w_{1} \right)} + \pi$$
$$x_{2} = 2 \pi n - \operatorname{asin}{\left(0 \right)} + \pi$$
$$x_{2} = 2 \pi n + \pi$$

Быстрый ответ

x1 = -2

$$x_{1} = -2$$

x2 = 0

$$x_{2} = 0$$

x3 = pi

$$x_{3} = \pi$$

Численный ответ

x1 = -75.398223686155

x2 = 34.5575191894877

x3 = -84.8230016469244

x4 = 28.2743338823081

x5 = 9.42477796076938

x6 = -15.707963267949

x7 = 37.6991118430775

x8 = 43.9822971502571

x9 = -6.28318530717959

x10 = 18.8495559215388

x11 = 81.6814089933346

x12 = -94.2477796076938

x13 = 25.1327412287183

x14 = -31.4159265358979

x15 = -69.1150383789755

x16 = -72.2566310325652

x17 = -53.4070751110265

x18 = 204.203522483337

x19 = 84.8230016469244

x20 = 6.28318530717959

x21 = -50.2654824574367

x22 = -56.5486677646163

x23 = 75.398223686155

x24 = 50.2654824574367

x25 = 21.9911485751286

x26 = -12.5663706143592

x27 = -3.14159265358979

x28 = -25.1327412287183

x29 = 62.8318530717959

x30 = 56.5486677646163

x31 = 12.5663706143592

x32 = 3.14159265358979

x33 = -97.3893722612836

x34 = 0.0

x35 = -37.6991118430775

x36 = -100.530964914873

x37 = -34.5575191894877

x38 = -43.9822971502571

x39 = -65.9734457253857

x40 = 31.4159265358979

x41 = -78.5398163397448

x42 = -9.42477796076938

x43 = 69.1150383789755

x44 = 94.2477796076938

x45 = 47.1238898038469

x46 = -2.0

x47 = -21.9911485751286

x48 = -62.8318530717959

x49 = 59.6902604182061

x50 = 97.3893722612836

x51 = 141.371669411541

x52 = 40.8407044966673

x53 = -81.6814089933346

x54 = -40.8407044966673

x55 = 78.5398163397448

x56 = -59.6902604182061

x57 = -87.9645943005142

x58 = -91.106186954104

x59 = -47.1238898038469

x60 = 72.2566310325652

x61 = -28.2743338823081

x62 = 53.4070751110265

x63 = -18.8495559215388

x64 = 15.707963267949

x65 = 87.9645943005142

x66 = 65.9734457253857

x67 = 91.106186954104

x68 = 100.530964914873

График