Home
О нас
Products
Services
Регистрация
Войти
Поиск
pavsasha
@pavsasha
July 2022
1
28
Report
Докажите тождество :
1/(1+ctga) - 1/(1-ctga) = tg 2a
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
kirichekov
Verified answer
1/(1+ctgα)-1/(1-ctgα)=tg2α
1. 1+ctgα=1+cosα/sinα=(sinα+cosα)/sinα
1:((sinα+cosα)/sinα)=sinα/(sinα+cosα)
2. 1/(1-ctgα)=sinα/(sinα-cosα)
3. sinα/(sinα+cosα)-sinα/(sinα-cosα)=(sin²α-sinα*cosα-sinα²α-sinα*cosα)/((sinα+cosα)*(sinα-cosα))=(-2sinα*cosα)/(-(cos²α-sin²α))=sin2α/cos2α=tg2α
tg2α=tg2α
0 votes
Thanks 1
More Questions From This User
See All
pavsasha
August 2022 | 0 Ответы
vnutri dannogo ugla a raspolozhena tochka na rasstoyanii a ot vershiny i na rasstoyan
Answer
pavsasha
July 2022 | 0 Ответы
zaranee spasibo najdite oblast opredeleniya funkcii y sinx koren iz h
Answer
pavsasha
July 2022 | 0 Ответы
(1-ctga) = tg 2a...
Answer
pavsasha
July 2022 | 0 Ответы
najti oblast opredeleniya y koren izh2 7h 6 koren iz h 3
Answer
pavsasha
July 2022 | 0 Ответы
pomogite pozhalujsta s ivt zaranee spasibo vse v qbasic 1 dan massiv a817a0de2eaf6b3eadd71b351d2e19e0f0 25541
Answer
pavsasha
July 2022 | 0 Ответы
dany vershiny a1 30 v 2 41 s 311 d020 parallelogramma absd v
Answer
pavsasha
July 2022 | 0 Ответы
smeshali nekotoroe kolvo 40 rastvora spirta s nekotorym kolichestvom 70 rastvora
Answer
pavsasha
July 2022 | 0 Ответы
3)...
Answer
pavsasha
July 2022 | 0 Ответы
najdite reshenie uravneniya 1cosx sinx sinxcosx 0
Answer
pavsasha
July 2022 | 0 Ответы
zaranee spasibo osushestvite cepochku prevrashenij 1 ca ca3n2 nh3 nh4oh 2 ca
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 "(1-ctga) = tg 2a..."
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
1/(1+ctgα)-1/(1-ctgα)=tg2α1. 1+ctgα=1+cosα/sinα=(sinα+cosα)/sinα
1:((sinα+cosα)/sinα)=sinα/(sinα+cosα)
2. 1/(1-ctgα)=sinα/(sinα-cosα)
3. sinα/(sinα+cosα)-sinα/(sinα-cosα)=(sin²α-sinα*cosα-sinα²α-sinα*cosα)/((sinα+cosα)*(sinα-cosα))=(-2sinα*cosα)/(-(cos²α-sin²α))=sin2α/cos2α=tg2α
tg2α=tg2α