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Show that the four points having posit...

Show that the four points having position vectors `6 hat i-7 hat j ,16 hat i-19 hat j-4 hat k ,3 hat j-6 hat k ,2 hat i-5 hat j+10 hat k` are not coplanar.

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We are given the points having position vectors

`vec A=6 hat i-7hat j`

`vec B= 16 hat i-19 hat j-4 hat k`

`vec C=3 hat j-6 hat k`

`vec D=2 hat i+5 hat j+10 hat k`

Now the distance are :

`vec(AB)= vec B- vec A`

`vec(AB)=(16 hat i-19 hat j-4 hat k)-(6 hat i-7 hat j+0 hat k)`

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RD SHARMA-ALGEBRA OF VECTORS-Solved Examples And Exercises
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  3. Show that the four points having position vectors 6 hat i-7 hat j ,1...

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  7. Prove that the following vectors are non-coplanar: hat i+2 hat j+3 ha...

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  8. If vec a ,\ vec b ,\ vec c are non coplanar vectors, prove that the...

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  14. Prove that 1,1,1 cannot be direction cosines of a straight line.

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  16. The vector vec r is inclined at equal acute angles of x-axis,y axis, ...

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  17. A vector vec r\ is inclined to x-axis at 45^0 and y-axis at 60^0dot ...

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  18. Find the direction cosines of the following vectors: 2 hat i+2 hat...

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  19. Find the direction cosines of the following vectors: 2 hat i+2 hat...

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