The lines $a x^2+2 h x y+b y^2=0$ are at right angles if

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Aicharya · Accepted Answer

The acute angle $(\theta)$ between lines represented by equation $a x^2+2 h x y+b y^2=0$, is $\theta=\tan ^{-1}\left(\frac{2 \sqrt{h^2-a b}}{|a+b|}\right)$ If lines are perpendicular then $a+b=0$.

The lines \(a x^2+2 h x y+b y^2=0\) are at right angles if

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