(adsbygoogle = window.adsbygoogle || []).push({}); geometric proof for vector relation-plz help!

hi there....

i am trying to prove the following relation from vectors geometrically however nothing comes to my mind..i have succeeded in proving it algebraically.

CAN ANYONE help me as to how do i prove this relation geometrically.

The relation is:

mag(A.B) <= mag A. mag B

where A and B are vectors

and mag stands for magnitude

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# Geometric proof for vector relation- !

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