Предмет: Алгебра, автор: алина523

вычислите интеграл
от пи/4 до пи/2 4 cos 2x dx

Ответы

Автор ответа: mymurkin
16
\int\limits^ \frac{ \pi }{2}_ \frac{ \pi }{4} cos{2x} \, dx =1/2sin2x \int\limits^ \frac{ \pi }{2}_ \frac{ \pi }{4}=1/2sin( \pi) -1/2sin (\pi /2) =0-1/2*1=-1/2
mymurkin: второй значок интеграла - это прямая линия с пределами
Предыдущий вопрос
Следующий вопрос
Интересные вопросы
Предмет: Другие предметы, автор: knopik59
Помогите решить не могу понять как делать
1 год назад
Предмет: Английский язык, автор: Аноним
Раскройте скобки, употребляя глаголы в Present Continuous или в Present Simple. 1 In the evening I often (to go) to see my friends. 2 On Sunday we sometimes (to go) to the cinema or to a disco club. 3 Andrew (to get) up very early as he (to live) far from school. He (to be) never late. 4 It (to be) six o'clock in the evening now. Victor (to do) his homework. His sister (to read) a book. His mother and grandmother (to talk). 5 I (to write) a letter to my grandmother who (to live) in Novgo-rod. I (to write) to her very often. 6 It (to take) me forty minutes to get to school. 7 Hello, Pete, where you (to go)? — I (to hurry) to school. 8 When your lessons (to begin) on Monday? — They (to begin) at nine o'clock. 9 Where your sister (to be)? — She (to do) her homework in the next room. 10 It usually (to take) me an hour to do my written exercises. 11 Where Boris (to be)? I (to look) for him. — He (to have) dinner. 12 I (to look) for a cassette recorder. You (to have) anything on sale? — Take a look at this little Sonic Walkman. — No, I (not to want) that kind. — Well, this Supersound might interest you. It (to be) a good size, it (to be) stereo and it (to have) a radio to listen to the news.
1 год назад
Предмет: Русский язык, автор: Mary46838
Аббривиатуры с объяснениями примеры
1 год назад
Предмет: Физика, автор: goodguy75
Каково соотношение сопротивле-
ний R1:R2:R3 , если U=127 В; U=45 В; U3=60 В; l2=2А?​
7 лет назад
Предмет: Русский язык, автор: d3n1log
Определить вид глаголов, спряжение, переходность: кончается, помчалась, уложили
7 лет назад