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  3. 21 use formula 13 to show that the direction cosines...

Question: 21 use formula 13 to show that the direction cosines...

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21. Use Formula (13) to show that the direction cosines of a vector (Ul, U2, U3) İn R3 are ˇ U1 cos β-U2. llvlI cos α 03 llvl
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