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The projection of a= 2i+3j-2k on b=i+2j+3k is

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Solution:

Projection of a on b $\ =vecacdot b/left | b ight |$

$\ Rightarrow vecacdot b/left | b ight |=(2i+3j-2k)cdot (i+2j+3k)/left | i+2j+3k ight |=2+6-6/sqrt14\ \=2/sqrt14$

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Deependra Verma

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