0.4i +0.8j+ck represents a unit vector when c is a).-0.2 b). under root0.2 c). under rout 0.8 d).0
Answer (1)
5th Jan, 2021
When 0.4i+0.8j+ck will represent a unit vector if ,
magnitude of the vector=1 => square root{(0.4)^2+(0.8)^2+c^2}=1
=> 0.16+0.64+c^2=1=> c= square root (0.2)
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