Question

If a unit vector is represented by 0.5i-0.8j+ck.find c

Answer 1

and is 1.3 because 0.5- 0.8 = -0.3

so adding 1.3 c become 1 i.e., unit vector

Answer 2

We know that ,

magnitude of unit vector = 1

So , magnitude of 0.5i-0.8j+ck should also be equal to 1 .

And further solution you can see in the attached image..

I hope this helps ☺️✌️