Home
О нас
Products
Services
Регистрация
Войти
Поиск
Физарух
@Физарух
July 2022
1
10
Report
cos(a+b) если cosa=0.6 sinb=-8/17 3n/2<a<2n n<b<3n/2
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
Gerren
Cos(a+b)=cosa*cosb-sina*sinb
cosa=0,6=3/5 sina=√(1-cosa^2)=√(1-0,36)=√0,64=-0,8=-4/5 тк
3n/2<a<2n - 4 четверть sina<0
sinb=-8/17 cosb=√(1-sinb^2)=√(1-64/289)=√225/289=-15/17 тк.
n<b<3n/2 - 3 четверть cosb<0
Cos(a+b=3/5(-15/17)-(-4/5)*(-8/17)=-45/85-32/85=-77/85
3 votes
Thanks 6
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 "2..."
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
cosa=0,6=3/5 sina=√(1-cosa^2)=√(1-0,36)=√0,64=-0,8=-4/5 тк 3n/2<a<2n - 4 четверть sina<0
sinb=-8/17 cosb=√(1-sinb^2)=√(1-64/289)=√225/289=-15/17 тк. n<b<3n/2 - 3 четверть cosb<0
Cos(a+b=3/5(-15/17)-(-4/5)*(-8/17)=-45/85-32/85=-77/85