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Let b ˆ , a ˆ be unit vectors. If c G be a vector such that the angle between a ˆ and c G is 12 π , and b ˆ = c G +2( c G × a ˆ ), then 2 | c 6 | G is equal to:

1. 6 (3 – 3 )
2. 3 + 3
3. 6(3 + 3 )
4. 6( 3 + 1)

Correct answer: 6(3 + 3 )

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