Home
О нас
Products
Services
Регистрация
Войти
Поиск
polinagarres
@polinagarres
August 2022
1
5
Report
помогите с тригонометрией
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
2cos²α/(ctgα/2-tgα/2)=
(1/2)*sin2α
1. ctgα/2-tgα/2=(cosα/2)/(sinα/2)-(sinα/2)/(cosα/2)=(cos²(α/2)-sin²(α/2))/(cosα/2*sinα/2)=cos(2*(α/2))/((1/2)*2sinα/2*cosα/2)=2cosα/sinα
2. 2cos²α:(2cosα/sinα)=cosα*sinα=(1/2)*2sinα*cosα=(1/2)sin2α
1 votes
Thanks 1
More Questions From This User
See All
polinagarres
August 2022 | 0 Ответы
pomogite s trigonometriejb7e3c4e7a24eb0e0625d9b90e823df9e 83617
Answer
polinagarres
August 2022 | 0 Ответы
pomogite s trigonometriejb0a975447c3e569aa28e4554c05be861 2210
Answer
polinagarres
August 2022 | 0 Ответы
pomogite s trigonometriej22febd6ec0797cabf719f77041b98256 24426
Answer
polinagarres
August 2022 | 0 Ответы
pomogite s trigonometriej36c73c182e9aec5f85c611a48f73e57a 88830
Answer
polinagarres
August 2022 | 0 Ответы
pomogite s geometriejcb377645ba869e8fe73ce89c1adff669 42634
Answer
polinagarres
August 2022 | 0 Ответы
pomogite s geometriej10348ccc29aa7c0a33e24cd8e7dd0940 6066
Answer
polinagarres
August 2022 | 0 Ответы
pomogite reshit zadanie po trigonometrii5ae2b121e78f3f2f67dc5dbbdde06809 45910
Answer
polinagarres
August 2022 | 0 Ответы
pomogite s trigonometriej2705df32452d40a4a457c7b4538cf172 26459
Answer
polinagarres
August 2022 | 0 Ответы
pomogite s geometriejcc983b78d8ccde65eb1da0398138b5a9 7623
Answer
polinagarres
July 2022 | 0 Ответы
pomogite s trigonometriejc4ad7e330071064a0c3907227e87f948 66110
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 с тригонометрией..."
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
2cos²α/(ctgα/2-tgα/2)=(1/2)*sin2α1. ctgα/2-tgα/2=(cosα/2)/(sinα/2)-(sinα/2)/(cosα/2)=(cos²(α/2)-sin²(α/2))/(cosα/2*sinα/2)=cos(2*(α/2))/((1/2)*2sinα/2*cosα/2)=2cosα/sinα
2. 2cos²α:(2cosα/sinα)=cosα*sinα=(1/2)*2sinα*cosα=(1/2)sin2α