Ответ:
Объяснение:
2cos(3П/2-x)sin(П/2-x)=√3sin(2П+x) [-5,5П; -3П]
-2sinxcosx=√3sin(x)
2sinxcosx+√3sin(x)=0
sinx(2cosx+√3)=0
sinx=0 2cosx+√3=0
x=Пk
cosx=-√3/2 x=5П/6+2Пk
x=7П/6+2Пk
-5,5П<= Пk <=-3П
-5,5<=k<=-3
k=-5; -4; -3
{x1=-5П ; x2=-4П; x3=-3П}
5П/6+2Пk
-5,5П<=5П/6+2Пk<=-3П
-5,5<=5/6+2k<=-3
-19/6<=k<=-23/12
k=-3; -2
x4=5П/6+2П(-2)=-19П/6
x5=5П/6+2П(-3)=-31П/6
-5,5П<=7П/6+2Пk<=-3П
-5,5<=7/6+2k<=-3
-20/3<=2k<=-4 1/6
-10/3<=k<=-2 1/12
-3 1/3<=k<=-2 1/12
x6=7П/6+2П(-2)=-17П/6
x7=7П/6+2П(-3)=-29П/6
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Answers & Comments
Ответ:
Объяснение:
2cos(3П/2-x)sin(П/2-x)=√3sin(2П+x) [-5,5П; -3П]
-2sinxcosx=√3sin(x)
2sinxcosx+√3sin(x)=0
sinx(2cosx+√3)=0
sinx=0 2cosx+√3=0
x=Пk
cosx=-√3/2 x=5П/6+2Пk
x=7П/6+2Пk
-5,5П<= Пk <=-3П
-5,5<=k<=-3
k=-5; -4; -3
{x1=-5П ; x2=-4П; x3=-3П}
5П/6+2Пk
-5,5П<=5П/6+2Пk<=-3П
-5,5<=5/6+2k<=-3
-19/6<=k<=-23/12
k=-3; -2
x4=5П/6+2П(-2)=-19П/6
x5=5П/6+2П(-3)=-31П/6
-5,5П<=7П/6+2Пk<=-3П
-5,5<=7/6+2k<=-3
-20/3<=2k<=-4 1/6
-10/3<=k<=-2 1/12
-3 1/3<=k<=-2 1/12
k=-3; -2
x6=7П/6+2П(-2)=-17П/6
x7=7П/6+2П(-3)=-29П/6