Find |\overrightarrow{a}| and |\overrightarrow{b}|, if ...

CBSE Class 12 Math 2020 Outside Delhi Set 1 Solved Paper

Question : 24 of 36

Marks: +1, -0

Find

|{a}↖{→}|

and

|{b}↖{→}|

, if

|{a}↖{→}|=2|{b}↖{→}|

and

({a}↖{→}+{b}↖{→}) ⋅({a}↖{→}-{b}↖{→})=12

.
OR
Find the unit vector perpendicular to each of the vectors

{a}↖{→}=4 {i}↖{\^}+3 {j}↖{\^}+{k}↖{\^}

and

{b}↖{→}=2 {i}↖{\^}-{j}↖{\^}+2 {k}↖{\^}

Solution: 👈: Video Solution

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