Bentuk Mengubah Fungsi

Solusi 1

\begin{equation*} \begin{split} 3x &  = 90^{\text{o}} + 2x + k \:.\: 360^{\text{o}} \\\\ x &  = 90^{\text{o}} + k \:.\: 360^{\text{o}} \\\\ k & = 0 \rightarrow {\color {red} x = 90^{\text{o}}} \end{split} \end{equation*}