Toán Lớp 11: Giải phương trình sau
5sinx-1=0
Leave a reply
Register Now
Login
Lost Password
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Toán Lớp 11: Giải phương trình sau
5sinx-1=0
Comments ( 2 )
\quad 5\sin x – 1 = 0\\
\Leftrightarrow \sin x = \dfrac15\\
\Leftrightarrow \left[\begin{array}{l}x = \arcsin\left(\dfrac15\right) + k2\pi\\x = \pi – \arcsin\left(\dfrac15\right) + k2\pi\end{array}\right.\quad (k\in\Bbb Z)\\
\text{Vậy}\ S = \left\{\arcsin\left(\dfrac15\right) + k2\pi;\ \pi – \arcsin\left(\dfrac15\right) + k2\pi\ \Bigg|\ k\in\Bbb Z\right\}
\end{array}\)