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

Toán Lớp 11: giải ptlg cơ bản:tan(x-pi/4)=tan2x

Toán Lớp 11: giải ptlg cơ bản:tan(x-pi/4)=tan2x

Comments ( 2 )

  1. chúc bn hc tốt vote mk 5* và ctlhn nhé

    toan-lop-11-giai-ptlg-co-ban-tan-pi-4-tan2

  2. tan(x-\frac{π}{4})=tan2x
    ⇔ x-\frac{π}{4}=2x+kπ
    ⇔ -x=\frac{π}{4}+kπ
    ⇔ x=-\frac{π}{4}-kπ \ (k∈\mathbb{Z})

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