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Home  >>  TN XII Math  >>  Vector Algebra
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Find the d . c. s of a vector whose direction ratios are $2 , 3 , -6.$

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  • The d.c.s of a vector with d.r.s $(a,b,c)$ are $\large\frac{a}{\sqrt{a^2+b^2+c^2}}, \large\frac{b}{\sqrt{a^2+b^2+c^2}}, \large\frac{c}{\sqrt{a^2+b^2+c^2}}$
The d.c.s of vector with d.r.s $(2,3,-6)$ are $ \large\frac{2}{\sqrt{4+9+36}},\large\frac{3}{\sqrt{4+9+36}},\large\frac{-6}{\sqrt{4+9+36}} = \large\frac{2}{7},\large\frac{3}{7},\large\frac{-6}{7}$
answered Jun 11, 2013 by thanvigandhi_1
 

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