Vektor satuan dari titik P(3, 0, -4) adalah…

rumusnya 1/√x²+y²+z² × (x y z)

=1/√3²+0²+(-4)² × (3 0 (-4) )

=1/√9+0+16 × (3 0 (-4))

=1/√25 × (3 0 (-4))

=1/5 × (3 0 (-4))

=(3/5 0 (-4/5) )