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in Mathematics by (74.1k points)
रेखा ` vecr =-hati +hatj +2hatk +lambda (3hati +2hatj +4hatk ) `और समतल ` vecr (2hati +hatj -3hatk )+4=0` के माध्य कोण है|
A. `sin ^(-1) ((4)/( sqrt( 406))) `
B. `sin ^(-1) (sqrt((4)/( 406))) `
C. `sin ^(-1) ((13)/(sqrt( 21))) `
D. `sin ^(-1) (sqrt((13)/( 21))) `

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Correct Answer - A

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