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in Straight Lines by (29.6k points)
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Find the measure of the acute angle between the lines represented by:

(a2 – 3b2)x + 8abxy + (b2 – 3a2)y = 0

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Comparing the equation

(a2 – 3b2)x + 8abxy + (b2 – 3a2)y2 = 0, with

Ax2 + 2Hxy + By2 = 0, we have,

If θ is the acute angle between the lines, then

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