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CBSE Class 12-science Answered

Let be the direction ratios of two lines and  be the angle between them. Then find the angle between them in the form of direction ratios. Also find the condition that the lines are perpendicular.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

 Letbe the direction ratios of two lines, then the angle between the vectors  is.       

If the lines are perpendicular, i.e.,
Answered by | 04 Jun, 2014, 03:23: PM

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