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

Toán Lớp 11: Giải các phương trình sau Tan3x = -√3/3

Toán Lớp 11: Giải các phương trình sau
Tan3x = -√3/3

Comments ( 2 )

  1. tan3x=$\frac{\sqrt{3}}{3}$  x $\neq$ π/6+kπ/3
    -> 3x=π/6+kπ
    -> x=π/18+kπ/3

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

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