2sin^2x-3sinxcosx-5cos^2x>0 ,срочно. Created by bratusnagybatus. algebra-ru

2sin^2x-3sinxcosx-5cos^2x>0 ,срочно...

bratusnagybatus @bratusnagybatus

March 2022 1 14 Report

2sin^2x-3sinxcosx-5cos^2x>0 ,срочно

Answers & Comments

NNNLLL54

Verified answer

Ответ:

$2sin^2x-3sinx\, cosx-5cos^2x>0\ \Big|:cos^2x>0\\\\2tg^2x-3tgx-5>0\ \ ,\ \ D=49\ \ ,\ \ tgx=-1\ \ \ ili\ \ \ tgx=2,5\\\\2(tgx+1)(tgx-2,5)>0\\\\znaki:\ \ +++(-1)---(2,5)+++\\\\tgx\in (-\infty ;-1\ )\cup (\ 2,5\ ;+\infty )\\\\a)\ \ tgx$

$Otvet:\ x\in \Big( -\dfrac{\pi}{2}+\pi n\ ;\ -\dfrac{\pi}{4}+\pi n\ \Big)\cup \Big(\ arctg2,5+\pi n\ ;\ \dfrac{\pi}{2}+\pi n\ \Big)\ ,\ n\in Z\ .$

2 votes Thanks 0

pomogite s chem mozhete pozhalujstaafe8e5c45cee5083fe3ebdd60127402f 13204

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

Answers & Comments

Verified answer

pomogite s chem mozhete pozhalujstaafe8e5c45cee5083fe3ebdd60127402f 13204

рекомендуемые вопросы

Helpful Links

Helpful Social