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Find the value of lambda so that the vec...

Find the value of `lambda` so that the vectors ` vec a=2 hat i+lambda hat j+ hat ka n d vec b= hat i-2 hat j+3 hat k` are perpendicular to each other.

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RD SHARMA-SCALAR OR DOT PRODUCT-Solved Examples And Exercises
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  19. If two vectors vec aa n d vec b are such that | vec a|=2,| vec b|=3a ...

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