3-d

Question: The angle between the straight lines $\frac{x-2}{2}=\frac{y-1}{5}=\frac{z+3}{-3}$and $\frac{x+1}{-1}=\frac{y-4}{8}=\frac{z-5}{4}$is

1) ${{\cos }^{-1}}\left( \frac{13}{9\sqrt{38}} \right)$

2) ${{\cos }^{-1}}\left( \frac{26}{9\sqrt{38}} \right)$

3) ${{\cos }^{-1}}\left( \frac{4}{\sqrt{38}} \right)$

4) ${{\cos }^{-1}}\left( \frac{2\sqrt{2}}{\sqrt{19}} \right)$

Solution:

Explanation: No Explanation

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