Question

if a unit vector is represented by 0.5i-0.8j+ck then the value of c

Answer 1

=>$\sqrt{ {0.5}^{2} + ( { - 0.8}^{2} + {c}^{2} } = 1$

=>${0.5}^{2} + {( - 0.8)}^{2} + {c}^{2} = 1$

=>$0.25 + 0.64 + {c}^{2} 1$

=>$0.89 + {c}^{2} = 1$

=>${c}^{2} = 1 - 0.89$

=>${c}^{2} = 0.11$

=>$c = \sqrt{0.11}$