Question

solve each equation on the interval [0,2pi]
cosx-2sinxcosx=0

Answer 1

\[\begin{align*}
\cos x-2\sin x\cos x&=0\\
\cos x(1-2\sin x)&=0\end{align*}\\

\implies\begin{cases}\cos x=0\\1-2\sin x=0\end{cases}\]

Answer 2

hello?