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Question
Find the slope of the lines which make the following angle with the positive direction of x-axis:
\[- \frac{\pi}{4}\]
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Solution
\[\theta = - \frac{\pi}{4}\]
\[\therefore \text { Slope of the line } = m = \tan\theta\]
\[ \Rightarrow \text { Slope of the line } = \tan\left( - \frac{\pi}{4} \right) = - \tan\left( \frac{\pi}{4} \right) = - 1\]
Hence, the slope of the line is \[-\]1.
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