If θ is the acute angle between the two lines whose direction cosines – InterviewSolution

1.	If θ is the acute angle between the two lines whose direction cosines are given by 3l+m+5n=0 and 6mn−2ln+5lm=0, then the value of secθ is equal to
Answer» If $θ$ is the acute angle between the two lines whose direction cosines are given by $3 l + m + 5 n = 0$ and $6 m n - 2 l n + 5 l m = 0,$ then the value of $sec θ$ is equal to

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