Question

Given that o.2i+bj+o.4k is a unit vector,what is the value of b?

Answer 1

b = 0.89

Step-by-step explanation:

The given vector is,
`A=0.2i+bj+0.4k`

A is a unit vector

We need to find the value of b.

For a unit vector, |A| = 1

So,

`0.2^2+b^2+0.4^2=1\\\\0.04+b^2+0.16=1\\\\0.2+b^2=1\\\\b^2=1-0.2\\\\b=0.89`

So, th value of b is 0.89.