Question

2cosx*ctgx+ctgx=0 помогите решить срочн

Answer 1

$2cosx*ctgx+ctgx=0\\ctgx(2cosx+1)=0\\\\\left[\begin{array}{ccc}ctgx=0\\cosx=-\frac{1}2\end{array}\right=\ \textgreater \ \left[\begin{array}{ccc}x=\frac{\pi}2+\pi n;n\in Z\\\\x=б\frac{2\pi}3+2\pi n;n\in Z\end{array}\right$