Toán Lớp 11: Giải các pt sau:
a,(cos x-1)(2cosx-1)/sinx =1-sin 2x +2cos ²x
b, cos (2x+ π/3)+ √3 cosx -sin x-3=0
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Toán Lớp 11: Giải các pt sau:
a,(cos x-1)(2cosx-1)/sinx =1-sin 2x +2cos ²x
b, cos (2x+ π/3)+ √3 cosx -sin x-3=0
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