cos^2x-sin^2x-sinx=0...

mrrodich @mrrodich

August 2022 1 5 Report

cos^2x-sin^2x-sinx=0

Answers & Comments

nKrynka Решение
Cos²x - sin²x - sinx = 0
1 - sin²x - sin²x - sinx = 0
2sin²x + sinx - 1 = 0
sinx = t
2t² + t - 1 = 0
D = 1 + 4*2*1 = 9
t₁ = (- 1 - 3)/4
t₁ = - 1
t₂ = (- 1 + 3)/4
t₂ = 1/2
1) sinx = - 1
x₁ = - π/2 + 2πk, k∈Z
2) sinx = 1/2
x = (-1)^n *arcsin(1/2) + πn, n∈ Z
x₂ = (-1)^n *(π/6) + πn, n∈ Z

3 votes Thanks 6

LordByron Чёрт,ты прав

More Questions From This User See All

mrrodich July 2022 | 0 Ответы

pomogite srochno pliz3 tolko 1 i 2

mrrodich June 2022 | 0 Ответы

pomogite reshit 2 uravneniya ne poluchaetsya celyj otvet3

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

pozhalujsta8b98a56c0152a07b8f4cbcd89aa2f01e 97513

sarvinozwakirjanova August 2022 | 0 Ответы

pomogite pozhalusto pzha519d7eb8246a08ab0df06cc59e9dedb 6631

Helpful Links

Политика конфиденциальности

Правила и условия

Контакты

Helpful Social

Copyright © 2024 SCHOLAR.TIPS - All rights reserved.