Category:Equation of Straight Line in Plane/Normal Form

This category contains pages concerning Equation of Straight Line in Plane/Normal Form:

Let $\LL$ be a straight line such that:

the perpendicular distance from $\LL$ to the origin is $p$

the angle made between that perpendicular and the $x$-axis is $\alpha$.

Then $\LL$ can be defined by the equation:

$x \cos \alpha + y \sin \alpha = p$