Question

A vector v forms with axis 0x and 0y the angles alpha=120º and beta=45º. What angle does v make with 0z? i know the answer is gama=45º, but how do i get there?

Answer 1

is anyone gonna answer this? i really need it.

Answer 2

having little trouble working it out...hold on

Answer 3

ok :)

Answer 4

just leave it, thanks for the time.. :)

Answer 5

fooound it. cos^2alpha+cos^2beta+co^2gama=1

Answer 6

\[\cos^2(\gamma) =1 - \cos^2(\alpha) - \cos^2(\beta) =\\
1- \frac 1 4 - \frac 1 2=\frac 14\\
\beta = 30
\]