Home
Class 12
MATHS
If the length of a vector be 7 and direc...

If the length of a vector be 7 and direction ratios be 2, -3, 6, then its direction cosines are

A

`(2)/(21),(-1)/(7),(2)/(7)`

B

`(2)/(7),(-3)/(7),(6)/(7)`

C

`(2)/(7),(3)/(7),(6)/(7)`

D

`(2)/(3),(-7)/(3),(6)/(3)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • THREE DIMENSIONAL GEOMETRY

    TARGET PUBLICATION|Exercise Critical Thinking|40 Videos

  • THREE DIMENSIONAL GEOMETRY

    TARGET PUBLICATION|Exercise Competitive Thinking|37 Videos

  • PROBABILITY DISTRIBUTION

    TARGET PUBLICATION|Exercise Evaluation test|5 Videos

  • TRIGONOMETRIC FUNCTIONS

    TARGET PUBLICATION|Exercise Evaluation Test|34 Videos

Similar Questions

Explore conceptually related problems

If a line has the direction ratios -1, 2, 3, then its direction cosines are

If a line has the direction ratios 4, -12, 18, then its direction cosines are

If as line has direction ratios 2, -1, -2, determine its direction cosines.

If a line has direction ratios 2,-1,-2 then what are its direction cosines ?

If a line has direction ratios 2,1,2 determine its direction cosines.

If a line has direction ratios 2,1,2, then what are its direction cosines?

If a line has the direction ratios sqrt(2),-sqrt(5),sqrt(2) , then its direction cosines are

If a line has direction ratios -18,-12,-4 then what are its direction cosines?

A vector r has length 21 and direction ratios 2, -3, 6. Find the direction cosines and components of r, given that r makes an obtuse angle with X-axis.