Find the direction cosines of a vector which is equally inclined to the x - axis, y - axis and z - axis.
Let the inclination with:
x - axis =
y - axis =
z - axis =
The vector is equally inclined to the three axes.
⇒
Direction cosines
We know that:cos2 α + cos2 β + cos2 γ = 1
⇒ cos2 α + cos2 α + cos2 α = 1 …(
⇒3 cos2 α = 1
⇒
Ans: