cos(x)=(1/10) (уравнение)

Найду корень уравнения: cos(x)=(1/10)

Вы ввели

cos(x) = 1/10

$$\cos{\left(x \right)} = \frac{1}{10}$$

Подробное решение

Дано уравнение
$$\cos{\left(x \right)} = \frac{1}{10}$$
- это простейшее тригонометрическое ур-ние
Это ур-ние преобразуется в
$$x = \pi n + \operatorname{acos}{\left(\frac{1}{10} \right)}$$
$$x = \pi n - \pi + \operatorname{acos}{\left(\frac{1}{10} \right)}$$
Или
$$x = \pi n + \operatorname{acos}{\left(\frac{1}{10} \right)}$$
$$x = \pi n - \pi + \operatorname{acos}{\left(\frac{1}{10} \right)}$$
, где n - любое целое число

Быстрый ответ

x1 = -acos(1/10) + 2*pi

$$x_{1} = - \operatorname{acos}{\left(\frac{1}{10} \right)} + 2 \pi$$

x2 = acos(1/10)

$$x_{2} = \operatorname{acos}{\left(\frac{1}{10} \right)}$$

Сумма и произведение корней

сумма

0 + -acos(1/10) + 2*pi + acos(1/10)

$$\operatorname{acos}{\left(\frac{1}{10} \right)} + \left(0 + \left(- \operatorname{acos}{\left(\frac{1}{10} \right)} + 2 \pi\right)\right)$$

=

2*pi

$$2 \pi$$

произведение

1*(-acos(1/10) + 2*pi)*acos(1/10)

$$1 \left(- \operatorname{acos}{\left(\frac{1}{10} \right)} + 2 \pi\right) \operatorname{acos}{\left(\frac{1}{10} \right)}$$

=

(-acos(1/10) + 2*pi)*acos(1/10)

$$\left(- \operatorname{acos}{\left(\frac{1}{10} \right)} + 2 \pi\right) \operatorname{acos}{\left(\frac{1}{10} \right)}$$

Численный ответ

x1 = -73.9275947805217

x2 = 95.7184085133271

x3 = 80.2107800877013

x4 = 14.0369995199925

x5 = -17.3789270159054

x6 = -42.5116682446238

x7 = 4.81255640154625

x8 = -83.152037898968

x9 = -14.0369995199925

x10 = -23.662112323085

x11 = 51.73611136307

x12 = -36.2284829374442

x13 = -80.2107800877013

x14 = -29.9452976302646

x15 = -58.0192966702496

x16 = -92.7771507020605

x17 = 86.4939653948809

x18 = 23.662112323085

x19 = -70.5856672846088

x20 = -67.6444094733421

x21 = -155.609003773856

x22 = 67.6444094733421

x23 = -86.4939653948809

x24 = 1.47062890563334

x25 = -99.06033600924

x26 = -874.833386603596

x27 = 92.7771507020605

x28 = 10588.6378715032

x29 = -26.6033701343517

x30 = -45.4529260558904

x31 = -48.7948535518034

x32 = -11.0957417087258

x33 = 76.8688525917884

x34 = -51.73611136307

x35 = -32.8865554415313

x36 = -39.1697407487109

x37 = 42.5116682446238

x38 = 70.5856672846088

x39 = -76.8688525917884

x40 = 20.3201848271721

x41 = 61.3612241661625

x42 = 7.75381421281292

x43 = 55.0780388589829

x44 = 102.001593820507

x45 = 29.9452976302646

x46 = -20.3201848271721

x47 = 89.4352232061475

x48 = 39.1697407487109

x49 = -95.7184085133271

x50 = 11.0957417087258

x51 = 99.06033600924

x52 = -55.0780388589829

x53 = 17.3789270159054

x54 = 32.8865554415313

x55 = 58.0192966702496

x56 = -7.75381421281292

x57 = 64.3024819774292

x58 = -1.47062890563334

x59 = 48.7948535518034

x60 = -64.3024819774292

x61 = -61.3612241661625

x62 = 83.152037898968

x63 = 26.6033701343517

x64 = -4.81255640154625

x65 = -89.4352232061475

x66 = -102.001593820507

x67 = 73.9275947805217

x68 = 45.4529260558904

x69 = 36.2284829374442

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