Предмет: Алгебра, автор: Ararar1

cos (2x + П/4) = 0 Помогите пожалуйста!

Ответы

Автор ответа: paradiseva

В общем виде уравнение $cosx=0$ - это частный случай, поэтому:
$cos (2x + \frac{ \pi }{4} ) = 0\\ 2x + \frac{ \pi }{4}= \frac{ \pi }{2}+ \pi k, k\in Z\\\\ 2x = \frac{ \pi }{2}- \frac{ \pi }{4}+ \pi k, k\in Z\\\\ 2x = \frac{ 2\pi }{4}- \frac{ \pi }{4}+ \pi k, k\in Z\\\\ 2x = \frac{ \pi }{4}+ \pi k, k\in Z |:2\\\\ x = \frac{ \pi }{8}+ \frac{ \pi k}{2}, k\in Z$

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Английский язык, автор: asel56

помагите перевод на русском Kazakhstan location Kazakhstan is located in the center of the Eurasian landmass in what is known as Central Asia. it's the heart of Eurasia. Peaceful and generous the land of kazakh has always been famous for its hospitality. It's not by accident, located on the crossroads of two ancient cultures - Europe and Asia. Kazakhstan is bordered on the east by China, on the south by Kyrgyzstan ard Uzbekistan, on the west by the Caspian Sea, and on the north by Russia. With a total surface area of 2.717.300 square kilometers, Kazakhstan is the ninth - largest country in the world. The northern border with Russia, which spans 6.846 kilometers, is the longest cantinuous bi - national border in the world. Kazakhstan is a country of superlatives, it sweeps from the high mountain border regions near China across the mineral rich regions of Eastern Kazakhstan, then further west across broad expanses of plains to the oil-rich regions of Western Kazakhstan near the shore of the Caspian Sea. To the south, Kazakhstan is bordered by the Aral Sea and the deserts of Central Asia. Kazakhstan is rich in oil, gas, and other mineral resources including gold, iron ore, coal, copper, chrome, and zinc. Massive Soviet Kazakhstan is home to the Baikonur Soviet Cosmodrome. Kazakhstan is also home to the main Soviet nuclear weapons testing range, not used since 1992, located near the city of Semipalatinsk in the northeastern part of the country. The population of Kazakhstan is about 16 million people.

2 года назад

Предмет: Русский язык, автор: вика3147

посадки выполнить морфемный разбор слова

2 года назад

Предмет: Русский язык, автор: BekSofia

На него какое лицо и падеж?

2 года назад

Предмет: Математика, автор: antonkarpov338

Очень надо помогите пожалуйста

8 лет назад

Предмет: Английский язык, автор: lizakarasiova11

Найдите и исправьте ошибки.
1.therty, thirten, siks, nain, tu, for, fife, eigt, tventy, sevente, three hundreds, million, ziro
2.nineth, sith, twoth, treeth, ileventh, fifyth, seventh, four hundreth eightyth oneth.
Помогите пж!! Срочно!!

8 лет назад