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pekonlockchok


1/ Tìm tập xác định :
a. y = [TEX]\frac{1}{cos2x - 3cosx + 2}[/TEX]
b. y= [TEX]\frac{1}{sin2x - cosx}[/TEX]
c. y = [TEX]\frac{sinx}{3tanx + 4cotx - 7}[/TEX]
d. y = [TEX]\frac{1}{tan3xcotx(pi/2 -2x)- 1}[/TEX]
a. y = [TEX]\frac{1}{cos2x - 3cosx + 2}[/TEX]
b. y= [TEX]\frac{1}{sin2x - cosx}[/TEX]
c. y = [TEX]\frac{sinx}{3tanx + 4cotx - 7}[/TEX]
d. y = [TEX]\frac{1}{tan3xcotx(pi/2 -2x)- 1}[/TEX]
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