Find the magnitude of the acute angle between the lines $2y+3x=4$ and $x+y=5$.
I have no idea how to start the above equation. I try to draw the graph of $2y+3x=4$ and $x+y=5$ in the calculator but nothing show in the calculator.
The formula provided in the text book is
gradient of $l_{1}=m_{1}=\tan \theta_{1}$
gradient of $l_{2}=m_{2}=\tan \theta_{2}$
Help me out! thanks.