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For any two vectors ` vec a` and ` vec b` , show that : `( vec a+ vec b)dot( vec a- vec b)=0, when | vec a|=| vec b|dot`

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RD SHARMA ENGLISH-SCALAR OR DOT PRODUCT-All Questions
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  3. For any two vectors vec a and vec b , show that : ( vec a+ vec b)dot...

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