## If denote the directions of cosines of three mutually perpendicular vectors i

Question

If  denote the directions of cosines of three mutually perpendicular vectors in the space , prove that \sf{AA^T \: = \: I},

Where,

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3 weeks 2021-08-23T06:46:09+00:00 1 Answer 0 views 0

## Answers ( )

1. Given :

(i=1,2,3) denote the direction cosines of three mutually perpendicular vectors in space.

Then,

Then,