Question

the unit vector of vector v=3i-4j+5k​

Answer 1

Explanation:

We have:

3i+4j-k

Let u=3i+4j−k .

Unit vectors are of the form ˆu=u|u| :⇒ˆu=3i+4j−k|3i+4j−k|

⇒ˆu=3i+4j−k√32+42+(−1)2

⇒^u=3i+4j−k√9+16+1

⇒ˆu=3i+4j−k√26