Find the direction cosines of x, y and z-axis.

Explanation

We know that the direction cosines makes an angle alpha, beta and gamma with x, y and z axis respectively are l,m and n


Now x axis makes an angle 0 with x axis, 90 with y axis & 90 with z axis.


So the direction cosine of x axis are:


`l=cos 0^circ quad m= cos 90^circ quad n=cos 90^circ`


`l=1 quad m=0 quad n=0`


Thus Direction cosines of x-axis are `1,0,0`.
Now y axis makes an angle 90 with x axis, 0 with y axis & 90 with z axis.


So the direction cosine of y axis are:


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