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

Toán Lớp 11: Giải phương trình sau : tan6x=tan2x

Toán Lớp 11: Giải phương trình sau : tan6x=tan2x

Comments ( 1 )

  1. tan 6x= tan 2x
    ⇔6x=2x+kπ
    ⇔x=$\frac{kπ}{4}$

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

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