Show that the equation of the line passing through the origin and m...

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Show that the equation of the line passing through the origin and making an angle ' \( \theta \) ' with the line \( y=m x+c \) is
\[
\frac{y}{x}=\pm \frac{m+\tan \theta}{1-m \tan \theta} \text {. }
\]
\( \mathrm{P} \)
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