# MTH103 TMA2 Questions and Solutions : Find the direction cosine [l,m,n] of the r=2i+4j-3k

Find the direction cosine [l,m,n] of the r=2i+4j-3k

a) $\frac{2}{\sqrt(29)},\frac{4}{\sqrt(29)},\frac{-3}{\sqrt(29)}$
b) $\frac{2}{\sqrt(27)},\frac{4}{\sqrt(27)},\frac{-3}{\sqrt(27)}$
c) $\frac{-1}{\sqrt(29)},\frac{5}{\sqrt(29)},\frac{4}{\sqrt(29)}$
d) $\frac{2}{\sqrt(27)},\frac{4}{\sqrt(27)},\frac{-3}{\sqrt(27)}$

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