The angle between two lines whose direction ratios are 1,2,1 and 2,-3,4 is:

30^o

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45^o

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90^o

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60^o

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Solution

The correct option is C
90^o

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Similar questions

The angle between the lines whose direction cosines are proportional to (1, 2, 1) and (2, -3, 6) is

(2, 2, 1)

(- 4, 1, 8)

3, 2, - 6

1, 2, 2

1

1

2

\sqrt{3} - 1,

- \sqrt{3} - 1, 4

2, 3, 6

1, 2, 2

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