Home
О нас
Products
Services
Регистрация
Войти
Поиск
gregorpechorin
@gregorpechorin
August 2022
1
13
Report
Помогите решить уравнение, пожалуйста
Please enter comments
Please enter your name.
Please enter the correct email address.
Agree to
terms of service
You must agree before submitting.
Send
Answers & Comments
Dимасuk
Verified answer
2cos²2x + cos2x + cos6x = 1
2cos²2x + cos2x
+ 4cos
³2x
- 3cos2
x = 1
4cos
³2x + 2cos²2x - 2cos2x - 1 = 0
2cos²2x(2cosx + 1) - (2cos2x + 1) = 0
(2cos²2x - 1)(2cosx + 1) = 0
Значение каждой скобки равно нулю, решаем два уравнения:
2cos²2x = 1
cos²2x = 1/2
cos2x = - √2/2
2x = ±3π/4 + 2πn, n ∈ Z
x = ±3π/8 + πn, n ∈ Z
cos2x =
√2/2
2x = ±π/4 + 2πn, n ∈ Z
x = ±π/8 + πn, n ∈ Z
2cosx = -1
cosx = -1/2
x =
±2π/3 + 2πn, n ∈ Z
Ответ:
x = ±2π/3 + 2πn, n ∈ Z; x = ±π/8 + πn, n ∈ Z; x = ±3π/8 + πn, n ∈ Z.
2 votes
Thanks 2
More Questions From This User
See All
gregorpechorin
August 2022 | 0 Ответы
tex] x = 1...
Answer
gregorpechorin
August 2022 | 0 Ответы
pomogite napisat programmu v python dany dejstvitelnye koefficienty a b c
Answer
gregorpechorin
August 2022 | 0 Ответы
tex]cos x = 1...
Answer
gregorpechorin
July 2022 | 0 Ответы
s vsledstvie chego gvozdik vhodit v dosku na 2 sm opredelite srednyuyu silu sopro
Answer
gregorpechorin
July 2022 | 0 Ответы
pomogite reshit pozhalujsta3e4af5cf6c99b8c4f2b2958693d85b46 99285
Answer
gregorpechorin
July 2022 | 0 Ответы
pomogite uprostit pozhalujsta868784378f8febdc9579e5292c049d91 35376
Answer
gregorpechorin
July 2022 | 0 Ответы
tex]...
Answer
gregorpechorin
July 2022 | 0 Ответы
pomogite s fizikoj pozhalujsta temperatura nagrevatelya 150s a holodilnika
Answer
gregorpechorin
July 2022 | 0 Ответы
pomogite 1 najdite massu molekuly vody 2 najti chislo atomov v alyuminievom pre
Answer
gregorpechorin
July 2022 | 0 Ответы
pomogiite pozhalujsta2157af4705c97ec55d615cde472bbadb 47531
Answer
рекомендуемые вопросы
rarrrrrrrr
August 2022 | 0 Ответы
o chem dolzhny pozabotitsya v pervuyu ochered vzroslye pri organizacionnom vyvoze n
danilarsentev
August 2022 | 0 Ответы
est dva stanka na kotoryh vypuskayut odinakovye zapchasti odin proizvodit a zapcha
myachina8
August 2022 | 0 Ответы
najti po grafiku otnoshenie v3v1 v otvetah napisano 9 no nuzhno reshenie
ydpmn7cn6w
August 2022 | 0 Ответы
Choose the correct preposition: 1.I am fond (out,of,from) literature. 2.where ar...
millermilena658
August 2022 | 0 Ответы
opredelite kak sozdavalas i kto sozdaval arabskoe gosudarstvo v kracii
MrZooM222
August 2022 | 0 Ответы
ch ajtmanov v rasskaze krasnoe yabloko ispolzuet metod rasskaz v rasskaze opi
timobila47
August 2022 | 0 Ответы
kakovo bylo naznachenie kazhdoj iz chastej vizantijskogo hrama pomogite pozhalujsta
ivanyyaremkiv
August 2022 | 0 Ответы
moment. 6....
pozhalujsta8b98a56c0152a07b8f4cbcd89aa2f01e 97513
sarvinozwakirjanova
August 2022 | 0 Ответы
pomogite pozhalusto pzha519d7eb8246a08ab0df06cc59e9dedb 6631
×
Report "Помогите решить уравнение, пожалуйста..."
Your name
Email
Reason
-Select Reason-
Pornographic
Defamatory
Illegal/Unlawful
Spam
Other Terms Of Service Violation
File a copyright complaint
Description
Helpful Links
О нас
Политика конфиденциальности
Правила и условия
Copyright
Контакты
Helpful Social
Get monthly updates
Submit
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Verified answer
2cos²2x + cos2x + cos6x = 12cos²2x + cos2x + 4cos³2x - 3cos2x = 1
4cos³2x + 2cos²2x - 2cos2x - 1 = 0
2cos²2x(2cosx + 1) - (2cos2x + 1) = 0
(2cos²2x - 1)(2cosx + 1) = 0
Значение каждой скобки равно нулю, решаем два уравнения:
2cos²2x = 1
cos²2x = 1/2
cos2x = - √2/2
2x = ±3π/4 + 2πn, n ∈ Z
x = ±3π/8 + πn, n ∈ Z
cos2x = √2/2
2x = ±π/4 + 2πn, n ∈ Z
x = ±π/8 + πn, n ∈ Z
2cosx = -1
cosx = -1/2
x = ±2π/3 + 2πn, n ∈ Z
Ответ: x = ±2π/3 + 2πn, n ∈ Z; x = ±π/8 + πn, n ∈ Z; x = ±3π/8 + πn, n ∈ Z.