Class 11MathematicsPair of straight linesAngle between the pair of straight lines, Condition for parallel and perpendicular lines
EasyIf $\theta$ is the acute angle between the pair of lines $12x^2 + 2hxy + 7y^2 = 0$ and $\tan \theta = \frac{8}{19}$,then $h =$
- A$\pm 6$
- B$\pm 7$
- C$\pm 8$
- D$\pm 10$
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