Question

If a unit vector is represented by 0.5i^ +0.8j^ +ck^, then find the value of c.

Answer 1

$\sqrt{11} \div 10$
this may help u.....

Answer 2

Answer:

root over 0.11

Explanation:

=> \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}