The product of perpendicular from(p,q) to the pair of lines x2-y2:0 is
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Length of perpendicular from (p,q) on to x - y = 0 is
Absolute value of (p - q) /√(p²+q²)
Length of perpendicular from (p,q) on to x + y = 0 is
Absolute value of (p + q) /√(p²+q²)
Now, product of perpendiculars is = (p² - q²) / (p² + q²)
Absolute value of (p - q) /√(p²+q²)
Length of perpendicular from (p,q) on to x + y = 0 is
Absolute value of (p + q) /√(p²+q²)
Now, product of perpendiculars is = (p² - q²) / (p² + q²)
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