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

Toán Lớp 11: Sinx căn 3/2 giải phương trình sau

Toán Lớp 11: Sinx căn 3/2 giải phương trình sau

Comments ( 1 )

  1. $\sin x = \dfrac{\sqrt 3}2$
    $⇔ \sin x = \sin \dfrac{\pi}3$
    \(⇔ \left[ \begin{array}{l}x=\dfrac{\pi}3+k2\pi\\x=\dfrac{2\pi}3+k2\pi\end{array} \right. (k\in \mathbb{Z})\) 
    Vậy $S=\left\{\dfrac{\pi}3+k2\pi ; \dfrac{2\pi}3+k2\pi \; \Bigg | \;  k\in \mathbb{Z}\right\}$

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

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