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Find the angle between the lines vecr =...

Find the angle between the lines `vecr = 3 hati - 2 hatj + 6 hatk + lamda (2 hati + hatj + 2 hatk) and `
`(2 hatj - 5 hatk)+ mu (6 hati + 3 hatj + 2hatk).`

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The correct Answer is:
`theta cos ^(-1) ""(19)/(21)`
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VMC MODULES ENGLISH-THREE DIMENSIONAL GEOMETRY -JEE ADVANCED (ARCHIVE)
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  14. If the distance of the point P(1,-2,1) from the plane x+2y-2z=alpha,...

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  15. Equation of the plane containing the straight line (x)/(2)= (y)/(3)= (...

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