Home
О нас
Products
Services
Регистрация
Войти
Поиск
pischalnikov99
@pischalnikov99
July 2022
1
24
Report
Решите уравнение cosxcos3x=0,5
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
sedinalana
1/2(cos2x+cos4x)=1/2
cos2x+2cos²2x-1=0
cos2x=a
2a²+a-1=0
D=1+8=9
a1=(-1-3)/4=-1⇒cos2x=-1⇒2x=π+2πn,n∈z⇒x=π/2+πn,n∈z
a2=(-1+3)/4=1/2⇒cos2x=1/2⇒2x=+-π/3+2πk,k∈z⇒x=π/6+πk,k∈z
2 votes
Thanks 1
More Questions From This User
See All
pischalnikov99
August 2022 | 0 Ответы
predstavit v vide proizvedeniya costsint
Answer
pischalnikov99
August 2022 | 0 Ответы
tex]...
Answer
pischalnikov99
August 2022 | 0 Ответы
perechislite 25 elementov neobhodimyh dlya zhizni
Answer
pischalnikov99
July 2022 | 0 Ответы
sravnenie vooruzhenij sssr i ssha na nachalo vtoroj mirovoj vojny mozhno i na 1941
Answer
pischalnikov99
June 2022 | 0 Ответы
tex]...
Answer
pischalnikov99
June 2022 | 0 Ответы
tex] sinx>0...
Answer
pischalnikov99
October 2021 | 0 Ответы
s2 napravlennym vniz najdite uskoreniya gruzov otnositelno zemli
Answer
pischalnikov99
September 2021 | 0 Ответы
2 sin 437
Answer
pischalnikov99
August 2021 | 0 Ответы
dana stroka preobrazovat ee udaliv kazhdyj simvol i povtoriv kazhdyj simvol
Answer
pischalnikov99
August 2021 | 0 Ответы
reshite pozhalujsta tg2xtgx0
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 "Решите уравнение cosxcos3x=0,5..."
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
cos2x+2cos²2x-1=0
cos2x=a
2a²+a-1=0
D=1+8=9
a1=(-1-3)/4=-1⇒cos2x=-1⇒2x=π+2πn,n∈z⇒x=π/2+πn,n∈z
a2=(-1+3)/4=1/2⇒cos2x=1/2⇒2x=+-π/3+2πk,k∈z⇒x=π/6+πk,k∈z