Toán Lớp 11: A Sin²x-3sinx+2=0
B. Cot²x-cotx=0
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Toán Lớp 11: A Sin²x-3sinx+2=0
B. Cot²x-cotx=0
Comments ( 2 )
{\sin ^2}x – 3\sin x + 2 = 0\\
\Leftrightarrow \left[ \begin{array}{l}
\sin x = 1\\
\sin x = 2\left( {VN} \right)
\end{array} \right.\\
\Leftrightarrow x = \frac{\pi }{2} + k2\pi ,k \in Z
\end{array}$