3-d

Question: If $\theta $ is the angle between the lines $AB$ and $CD$, then projection of line segment $AB$on line $CD$, is



1) $AB\sin \theta $
2) $AB\cos \theta $
3) $AB\tan \theta $
4) $CD\cos \theta $
Solution: Explanation: No Explanation
System of co-ordinates Direction cosines and direction ratios Projection

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