Home
О нас
Products
Services
Регистрация
Войти
Поиск
ulianavanil1
@ulianavanil1
August 2021
1
7
Report
Помогите решить тема , тригонометрические формулы
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
dasdasfa
6) =4cosa-cosa=3cosa; 3*(-0,9)=-2,7
7)sin^2 a+cos^2 a=1
sina=+√(1-cos^2 a), 2-ая четверть
sina=√(1-(-√11/15)^2)=√(1-11/15)=√(4/15)=2/√15;
√15 sina=√15 *(2/√15)=2
8) (2√3(sin50 sin(90+10)+cos50si10)) /(cos40 cos(90+10) + sin40 cos10)=
(2√3(sin50 cos10+cos50sin10)) / (-cos40 sin10 +sin40 cos10)=
=(2√3 sin(50+10)) /(sin(40-10))=(2√3sin60) / (sin30)=(2√3 * √3/2) / (1/2)=3*2=6;
9) √7 tga (-cosa)=√7 (sina/cosa) *(-cosa)=-√7sina;
sina=√7/5;
-√7*(√7/5)=-7/5=-1,4
10)2√3sin(6π+π/3) *sin(3π-π/6)=2√3sin(π/3) *sin(π/6)=2√3 * (√3/2)*1/2)=
=(2*3)/4=3/2=1,5
11)1/cos^2x=1+tg^2x;получим
1+tg^2 x+cosx=tg^2 x
cosx=-1; x=π+2πn, n-целое
12)sin(π+x)=-sinx, тогда
-sinx=cosπ
-sinx=-1
sinx=1; x=π/2+2πn
2 votes
Thanks 1
More Questions From This User
See All
ulianavanil1
August 2022 | 0 Ответы
pomogite reshit 3i 4 nomer zaranee spasibo
Answer
ulianavanil1
August 2022 | 0 Ответы
pomogite reshit ochen proshu653a29ba473d0ea1a13a09639f73f417 23096
Answer
ulianavanil1
August 2022 | 0 Ответы
3) +1=0 2) 2 sin x-1=0...
Answer
ulianavanil1
August 2022 | 0 Ответы
2 sin x koren iz 2 0
Answer
ulianavanil1
July 2022 | 0 Ответы
perevedite na anglijskij zaranee spasibo v etom godu v rossii prohodit vsemirnyd945cbc9c5a9b3e3dc424c562dda3b0f 4153
Answer
ulianavanil1
July 2022 | 0 Ответы
4) + 1 = 0...
Answer
ulianavanil1
July 2022 | 0 Ответы
pomogite postavit v pravelnuyu formu you to appoint to the new post not
Answer
ulianavanil1
July 2022 | 0 Ответы
perevedite na anglijskij zaranee spasibo v etom godu v rossii prohodit vsemirny
Answer
ulianavanil1
July 2022 | 0 Ответы
pomogite reshit pozhalujstaf15168f95bf3546a3e9b0dfb6d879ef0 81300
Answer
ulianavanil1
July 2022 | 0 Ответы
kak mnogokletochnye organizmy mogut regulirovat svoyu zhiznedeyatelnost pomogite
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 решить тема , тригонометрические формулы..."
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
7)sin^2 a+cos^2 a=1
sina=+√(1-cos^2 a), 2-ая четверть
sina=√(1-(-√11/15)^2)=√(1-11/15)=√(4/15)=2/√15;
√15 sina=√15 *(2/√15)=2
8) (2√3(sin50 sin(90+10)+cos50si10)) /(cos40 cos(90+10) + sin40 cos10)=
(2√3(sin50 cos10+cos50sin10)) / (-cos40 sin10 +sin40 cos10)=
=(2√3 sin(50+10)) /(sin(40-10))=(2√3sin60) / (sin30)=(2√3 * √3/2) / (1/2)=3*2=6;
9) √7 tga (-cosa)=√7 (sina/cosa) *(-cosa)=-√7sina;
sina=√7/5;
-√7*(√7/5)=-7/5=-1,4
10)2√3sin(6π+π/3) *sin(3π-π/6)=2√3sin(π/3) *sin(π/6)=2√3 * (√3/2)*1/2)=
=(2*3)/4=3/2=1,5
11)1/cos^2x=1+tg^2x;получим
1+tg^2 x+cosx=tg^2 x
cosx=-1; x=π+2πn, n-целое
12)sin(π+x)=-sinx, тогда
-sinx=cosπ
-sinx=-1
sinx=1; x=π/2+2πn