Ответы на вопрос:
Cos(2x/3) +5sin(x/3)+2=0 1-2sin²(x/3)+5sin(x/3)+2=0 2sin²(x/3)-5sin(x/3)-3=0 sin(x/3)=a 2a²-5a-3=0 d=25+24=49 a1=(5-7)/4=-1/2⇒sin(x/3)=-1/2⇒(x/3)=(-1)^n+1 * π/6+πn⇒x=(-1)^n+1 * π/2+3πn a2=(5+7)/4=3⇒sin(x/3)=3∈[-1; 1]
Популярно: Алгебра
-
ZelyakAnna24.06.2020 06:02
-
egorilin1626hdhudn29.04.2021 09:50
-
isaev40daniil1411.12.2022 00:52
-
Гулчехра102202.05.2022 21:20
-
xeniaverner15.01.2023 10:15
-
Sfdfgc27.03.2021 23:54
-
хасан0216.09.2022 13:53
-
Anastasia15Kovaleva24.11.2020 10:33
-
antarxanoff200105.08.2022 18:28
-
diana02lili05.09.2022 03:35