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If A,B,C,D are (2,3,-1),(3,5,-3),(1,2,3)...

If A,B,C,D are (2,3,-1),(3,5,-3),(1,2,3),(3,5,7) respectively, then the angel between AB and CD, is

A

`(pi)/(2)`

B

`(pi)/(3)`

C

`(pi)/(4)`

D

`(pi)/(6)`

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The correct Answer is:
A
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TARGET PUBLICATION-THREE DIMENSIONAL GEOMETRY -Competitive Thinking
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  13. The acute angle between the lines whose direction ratios are 1, 2, 2 a...

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  14. Find the angle between the following pair of lines: A lines with direc...

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  15. If A,B,C,D are (2,3,-1),(3,5,-3),(1,2,3),(3,5,7) respectively, then th...

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