The direction cosines of the normal to the plane \[3x+4y+12z=52\] will

1.	The direction cosines of the normal to the plane \[3x+4y+12z=52\] will be [MP PET 1997]
A.	3, 4, 12
B.	? 3, ? 4, ? 12
C.	\[\frac{3}{13},\frac{4}{13},\frac{12}{13}\]
D.	\[\frac{3}{\sqrt{13}},\frac{4}{\sqrt{13}},\frac{12}{\sqrt{13}}\]
Answer» D. \[\frac{3}{\sqrt{13}},\frac{4}{\sqrt{13}},\frac{12}{\sqrt{13}}\]

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The direction cosines of the normal to the plane \[3x+4y+12z=52\] will be [MP PET 1997]

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