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Home  >>  EAMCET  >>  Mathematics
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The direction cosines of the line passing through $P(2,3,-1) $ and the orgin are :

\[\begin {array} {1 1} (a)\;\frac{2}{\sqrt {14}},\frac{3}{\sqrt {14}},\frac{1}{\sqrt {14}} & \quad (b)\;\frac{2}{\sqrt {14}},\frac{-3}{\sqrt {14}},\frac{1}{\sqrt {14}} \\ (c)\;\frac{-2}{\sqrt {14}},\frac{-3}{\sqrt {14}},\frac{1}{\sqrt {14}} & \quad (d)\;\frac{2}{\sqrt {14}},\frac{-3}{\sqrt {14}},\frac{-1}{\sqrt {14}} \end {array}\]
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1 Answer

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 $(c)\;\frac{-2}{\sqrt {14}},\frac{-3}{\sqrt {14}},\frac{1}{\sqrt {14}}$

 

answered Feb 27, 2014 by meena.p
edited Mar 4, 2014 by meena.p
 
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