Find the value of p such that the lines ( frac{x+11}{4}= frac{y+3}{-2}= frac{z-3}{4} ,and , frac{x-3}{p}= frac{y+12}{2}= frac{z-3}{-12} ) are at right angles to each other.

Find the value of p such that the lines ( frac{x+11}{4}= frac{y+3}{-2

1.	Find the value of p such that the lines ( frac{x+11}{4}= frac{y+3}{-2}= frac{z-3}{4} ,and , frac{x-3}{p}= frac{y+12}{2}= frac{z-3}{-12} ) are at right angles to each other.
A.	p=11
B.	p=12
C.	p=13
D.	p=4
Answer» D. p=4

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Find the value of p such that the lines ( frac{x+11}{4}= frac{y+3}{-2}= frac{z-3}{4} ,and , frac{x-3}{p}= frac{y+12}{2}= frac{z-3}{-12} ) are at right angles to each other.
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