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lordphantom
@lordphantom
August 2022
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cos^4*2x+1=cos^2*(x-pi/4)
Решите уравнение, плиз)
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Варвара1221
1)cos(x+pi/4)=0
x+pi/4=pi/2+2pi*n
x=pi/2-pi/4+2pi*n
x=pi/4+2pi*n
2)cos(x+2X)=-1
cos3x=-1
3x=pi+2pi*n
x=pi/3+2pi*n/3
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Answers & Comments
x+pi/4=pi/2+2pi*n
x=pi/2-pi/4+2pi*n
x=pi/4+2pi*n
2)cos(x+2X)=-1
cos3x=-1
3x=pi+2pi*n
x=pi/3+2pi*n/3