Question

0.4 î+0.8 i+ck represents a unit vector when cis
(1) -0.2
(2) √0.2
(3) V0.8​

Answer 1

Answer:

2) √ 0.2

Explanation:

its magnitude=√ 0.4^2 + 0.8^2 + c^2=1

find c from here