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Консультация № 184444
13.11.2011, 21:41
65.00 руб.
0
6
1
Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
Обсуждение
13.11.2011, 21:56
общий
это ответ
Здравствуйте, Stanislav Bolshakov!
Элемент длины дуги
dl=(x'2+y'2)1/2dt=((-sin t)2+(cos t)2)1/2dt=dt
Интеграл
I=[$8747$]0pi/2(cos t+sin t)dt=(sin t-cos t)|0pi/2=(1-(-1))=2
Элемент длины дуги
dl=(x'2+y'2)1/2dt=((-sin t)2+(cos t)2)1/2dt=dt
Интеграл
I=[$8747$]0pi/2(cos t+sin t)dt=(sin t-cos t)|0pi/2=(1-(-1))=2
Неизвестный
13.11.2011, 21:59
общий
Адресаты:
Не могли бы вы предоставить решение на бумаге и сфотографировать?
13.11.2011, 22:56
общий
что означает dl=(x'2+y'2)1/2dt эта запись?
Корень квадратный из суммы производных функций x(t) и y(t), умноженный на dt. Это элемент длины дуги. Впрочем, это написано ответе. Читайте учебник.
Форма ответа
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