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सदिश ` 2hati -3hat j + 6hatk ` के अनुदिश एक ऐसा सदिश ज्ञात कीजिए जिसका परिमाण 21 इकाई है|

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माना ` veca =2hati-3hatj +6hatk `
` therefore" "|vec a | =sqrt((2) ^(2) +(-3)^(2) + 6^(2)) `
` " "= sqrt (4+ 9+36)= sqrt(49=7) `
सदिश ` veca ` के अनुदिश मात्रक सदिश
` " " hat a =(2)/(7) hati -(3)/(7) hatj +(6)/(7) hatk `
` therefore ` अभीष्ट सदिश
` " " 21 hata =21 ( ( 2)/(7) hati -(3)/(7) hatj +(6)/(7) hat k ) = 6hat i-9hat j + 18 hatk `
यहाँ सदिश ` 2hati -3hatj + 6hatk ` और ` 6hati -9hatj+ 18hatk ` समदीश है|

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