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If (1,2,-2) are the D.R's of a line then...

If (1,2,-2) are the D.R's of a line then Statement-I : The D.C's of the are `[(-1)/(3),(-2)/(3),(2)/(3)]`
Statement-II : The D. C's of the line are `[(1)/(3),(2)/(3),(2)/(3)]`
Which of the above statement is correct :

A

Only I

B

Only II

C

Both I and II

D

Neither I nor II

Text Solution

Verified by Experts

The correct Answer is:
A
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AAKASH SERIES-DIRECTION COSINES & RATIOS-PRACTICE EXERCISE
  1. If the d.c.s of the line joining the oints P(4,3,5) and Q(1,1,k) are (...

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  2. If d.c's of the line joining the origin and a point unit distance from...

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  3. If (1,2,-2) are the D.R's of a line then Statement-I : The D.C's of t...

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  4. Assertion (A) : If a line make angles 45^(@), 45^(@) with the x and y ...

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  5. If a line makes angles cos^(-1)(1//5),cos^(-1)(3//5) with X and Y- axe...

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  6. The angle between the two lines whose direction cosines are ((sqrt(3))...

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  7. The angle between the line passing through the points (3,1,-2) and (4...

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  8. If the d.r's of two lines are (x,3,5) and (2,-1,2) and if the anlgle ...

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  9. The d.r.s of two perpendicular lines are 1,-3,5 and lambda,1 + lambda...

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  10. If the line joining the points (-1,2,3) (2,-1,4) is perpendicular to t...

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  11. If (1,-2,-2) and (0,2,1) are direction ratios of two lines, then direc...

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  12. If the line joining the points (1,4,2) and (-2,1,2) is inclined at an...

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  19. If the d.c's (l,m,n) of two lines are connected by the relations 3l+m+...

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  20. If the direction rations of two lines are given by 3lm-4ln+mn = 0 and ...

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