Home
О нас
Products
Services
Регистрация
Войти
Поиск
natashahera
@natashahera
August 2021
2
19
Report
Помогите пожалуйста.Упростите выражение cos 5a + cos 9a ÷ sin 5a + sin 9a.
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
Johnny21
=
=
= ctg7x
2 votes
Thanks 1
natashahera
Спасибо)
salnik1909p5sg3s
1) cos5a+cos9a=2cos((5a-9a)/2)*cos((5a+9a)/2)=2cos(-2a)*cos7a
2) sin5a+sin9a=2sin((5a+9a)/2)*cos((5a-9a)/2)=2sin7a*cos(-2a)=
3) 2cos(-2a)*cos7a/2cos(-2a)*sin7a=cos7a/sin7a=ctg7a
Ответ: ctg7a
1 votes
Thanks 2
natashahera
Спасибо)
More Questions From This User
See All
natashahera
August 2022 | 0 Ответы
pomogite pozhalujsta5ec246d2fcef75daa7a4e628e8741f8a 5267
Answer
natashahera
August 2022 | 0 Ответы
pomogite pozhalujsta0b8c848c616c823ddb70419577ae7485 5129
Answer
natashahera
August 2022 | 0 Ответы
pomogite pozhalujstavychislite polzuyas sootvetstvuyushej formule svedeniya 1 co
Answer
natashahera
August 2022 | 0 Ответы
1rechennya z odnoridnimi prisudkami ane tiloa dusha ye lyudinoyu bsnom blakitnim
Answer
natashahera
August 2022 | 0 Ответы
1yaka z navedenih rivnostej pravilna 164 18 2 32 3 1 1 2z
Answer
natashahera
August 2022 | 0 Ответы
pryami avas i ad poparno perpendikulyarniznajdit vidrizok sdyaksho vd9 smvs16
Answer
natashahera
August 2022 | 0 Ответы
skolko ploskostej prohodit cherez dannuyu tochku prostranstva perpendikulyarno dann
Answer
natashahera
August 2022 | 0 Ответы
vidstan vid tochki r do vsih vershin kvadrata dorivnyuye 5 smznajdit dovzhinu perp
Answer
natashahera
August 2022 | 0 Ответы
iz tochki a k ploskosti a provedena naklonnaya av i perpendikulyar aonajdite ovyak
Answer
natashahera
August 2022 | 0 Ответы
v treugolnike avs ugol s pryamoj a ugol a raven 30 gradusivcherez tochku s prove
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 пожалуйста.Упростите выражение cos 5a + cos 9a ÷ sin 5a + sin 9a..."
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
2) sin5a+sin9a=2sin((5a+9a)/2)*cos((5a-9a)/2)=2sin7a*cos(-2a)=
3) 2cos(-2a)*cos7a/2cos(-2a)*sin7a=cos7a/sin7a=ctg7a
Ответ: ctg7a