Mark (√) against the correct answer in the following:

What is the angle which the vector makes with the z-axis?

Given vector is

Property: for the vector , Direction cosines dc’s are

Therefore the dc’s of the given vector is

=

=

=

Let the angle made by the vector with the Z axis be γ.

we got that the cosine of the angle γ is

⇒

⇒

⇒ γ=