Math, asked by rohanchandru7, 8 months ago

If cos α, cos β, cos γ are the direction cosines of a vector a,
​​​​​​​ then cos 2α+cos 2 β +cos 2γ is equal to
a) 2           b) 3          c) -1           d) 0​

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Answered by sprao53413
1

Answer:

Please see the attachment

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