Home
О нас
Products
Services
Регистрация
Войти
Поиск
marina1001
@marina1001
July 2022
2
2
Report
найдите 5cos a, если sin a = - (корень из 3/2) , cos a<0
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
Vasily1975
Verified answer
Согласно основному тригонометрическому тождеству, sin²α+cos²α=1. Отсюда cos²α=1-sin²α=1-(-√3/2)²=1-3/4=1/4. А так как по условию cos α<0, то cos α=-√1/4=-1/2. Тогда 5*cos α=5*(-1/2)=-5/2. Ответ: -5/2.
2 votes
Thanks 0
sedinalana
Verified answer
Sina=-√3/2,cosa<0
cosa=-√(1-sin²a)=-√(1-3/4)=-√(1/4)=-1/2
5cosa=5*(-1/2)=-5/2=-2,5
0 votes
Thanks 0
More Questions From This User
See All
marina1001
August 2022 | 0 Ответы
vyberi v skobkah i podcherkni nuzhnuyu formu prilagatelnogo january is a cold c
Answer
marina1001
July 2022 | 0 Ответы
2),sin a>0...
Answer
marina1001
July 2022 | 0 Ответы
ihail v elektronnoj tablice v yachejkah s1 s2 s3 i s4 zapisal celye chisla v yache
Answer
marina1001
July 2022 | 0 Ответы
2...
Answer
marina1001
July 2022 | 0 Ответы
2 a cospiaa1658463734c2241b0fd85982ef0ff93 52516
Answer
marina1001
July 2022 | 0 Ответы
reshite uravnenie 345208 k621e44e3f08a8e92940d8fb5a7f039c7a7a 58422
Answer
marina1001
March 2022 | 0 Ответы
tonkaya rasseivayushaya linza s fokusnym rasstoyaniem 10 sm umenshila predmet v 2 raz
Answer
marina1001
March 2022 | 0 Ответы
s i okruglite do celyh
Answer
marina1001
March 2022 | 0 Ответы
matematicheskij mayatnik sovershaet malye garmonicheskie kolebaniya s chastotoj 05 gc
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 "2) , cos a<0..."
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
Согласно основному тригонометрическому тождеству, sin²α+cos²α=1. Отсюда cos²α=1-sin²α=1-(-√3/2)²=1-3/4=1/4. А так как по условию cos α<0, то cos α=-√1/4=-1/2. Тогда 5*cos α=5*(-1/2)=-5/2. Ответ: -5/2.Verified answer
Sina=-√3/2,cosa<0cosa=-√(1-sin²a)=-√(1-3/4)=-√(1/4)=-1/2
5cosa=5*(-1/2)=-5/2=-2,5