Question

A unit vector is represented by aI+bj+ck.If the values of a and b are 0.6 and o.8 respectively .Find the value of c

Answer 1

Magnitude of unit vector =1

$\sqrt{ {x}^{2} + {y}^{2} + {z}^{2} } = 1$
$\sqrt{ {0.6}^{2} + {0.8}^{2} + {c}^{2} } = 1$
$0.36 + 0.64 + c = 1$

c=0