`vecExxvecB=(10hati+5hatj-3hatk)xx(2hati-7hatj-5hatk)`
`=10hatixx(2hati-7hatj-5hatk)+5hatjxx(2hati-7hatj-5hatk)-3hatkxx(2hati-7hatj-5hatk)`
`=-70hatk-50(-hatj)+10(-hatk)-25hati-6hatj+21(-hati)=-46hati+44hatj-80hatk.`
इस दिशा में इकाई वेक्टर
`=(vecExxvecB)/(|vecExxvecB|)=(-46hati+44hatj-80hatk)/(sqrt(46^(2)+44^(2)+80^(2)))~~(-23hati+22hatj-40hatk)/(51).`