Question

What is the formula of Bisectors of angles between two lines?

Answer

Bisectors of angles between two lines: $\frac{a_{1}x+b_{1}y+c_1}{\sqrt{a_1^2+b_1^2}}=\frac{a_{2}x+b_{2}y+c_2}{\sqrt{a_2^2+b_2^2}}$