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Find the angle between the lines whos...

Find the angle between the lines whose direction cosines are connected by the relations `l+m+n=0a n d2//m+2n l-m n=0.`

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To find the angle between the lines whose direction cosines are connected by the relations \( l + m + n = 0 \) and \( 2lm + 2nl - mn = 0 \), we can follow these steps: ### Step 1: Write the equations We have two equations: 1. \( l + m + n = 0 \) (Equation 1) 2. \( 2lm + 2nl - mn = 0 \) (Equation 2) ### Step 2: Express \( n \) in terms of \( l \) and \( m \) ...
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