Напряжение в цепи переменного тока изменяется по закону u=140sin314t. Определить действующее значение напряжения.

Варианты ответа:

1. 140 В 2. 224 В 3. 197 В 4. 99 В

Показать решение

Географическая широта бывает___________и____________

географическая долгота бывает__________и____________

Помогите 

под корнем 14 вычесть под корнем 2?

Помогитеее ,пожалуйстааа!!!Заранее спасибо.

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