Toán Lớp 11: MN giúp mình vs:
*Giải các pt sau:
1)cos^2x-2sin2x.sinx-1=0
2)2tan^2x+3=3/cosx
3)3cos^2 6x+8sin3x.cos3x-4=0
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Toán Lớp 11: MN giúp mình vs:
*Giải các pt sau:
1)cos^2x-2sin2x.sinx-1=0
2)2tan^2x+3=3/cosx
3)3cos^2 6x+8sin3x.cos3x-4=0
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