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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 11: Gpt bậc nhất đối với sinx,cosx: a,2sinx-3cosx=√13 sin6x b,sin3x-cos7x=√3 (sin7x+cos3x)

Toán Lớp 11: Gpt bậc nhất đối với sinx,cosx:
a,2sinx-3cosx=√13 sin6x
b,sin3x-cos7x=√3 (sin7x+cos3x)

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222-9+11+12:2*14+14 = ? ( )

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