Grade upto college level Algebra
the sum of direction of cosines of z axis?
1 Answer
Latika Leekha
Hello student,
The direction cosines of x-axis are (1, 0, 0)
Direction cosines of y-axis are (0, 1, 0)
Direction cosines of z-axis are (0, 0, 1).
And we know if l. m , n are the direction cosines of an axis, then l2+m2+n2 =1 i.e. the sum of squares of driection cosines of any line is always 1.
Hope this helps!
The direction cosines of x-axis are (1, 0, 0)
Direction cosines of y-axis are (0, 1, 0)
Direction cosines of z-axis are (0, 0, 1).
And we know if l. m , n are the direction cosines of an axis, then l2+m2+n2 =1 i.e. the sum of squares of driection cosines of any line is always 1.
Hope this helps!
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