4сosx/sinx:(1+cos²x/sin²x)+2sin²2x+1=0
4cosx/sinx*sin²x/(si²x+cos²x)+2sin²2x+1
4cosx*sinx+2sin²2x+1=0
4sinxcosx+4sin²xcos²x+1=0
(2sinxcosx+1)²=0
(sin2x+1)²=0
sin2x=-1
2x=-π/2+2πk
x=-π/4+πk/2,k∈z
F (x)=(-2x+3)^8
f'= 8*(-2x+3)^7*(-2x+3)'=-16(-2x+3)^7
Sin(3π/2-t)=-cost
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3х-4=26
3х=26+4
3х=30
х=30:3
х=10