# Find a dot b given that ...(please see description)? Thanks

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Suppose #vec"OA"=a# , #vec"OB"=b# , #|a|=3# , #|b|=sqrt7# and #atimesb= i +2j-3k#

Find #a*b#

Suppose

Find

##### 1 Answer

Jun 26, 2017

#### Explanation:

We know that,