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If |bar(u)|=2 and bar(u) makes angles of...

If `|bar(u)|=2 and bar(u)` makes angles of `60^(@) and 120^(@)` with OX and OY respectively , then vector `bar(u)=`

A

`i+j-sqrt(jk)`

B

`i-j+sqrt(2)k`

C

`i+j+sqrt(2)k`

D

`i+sqrt(2)j-k`

Text Solution

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The correct Answer is:
b
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MARVEL PUBLICATION-THREE DIMENSIONAL GEOMETRY-MULTIPLE CHOICE QUESTIONS
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  2. If |bar(u)| = sqrt(3) and bar(u) is equally inclined to co - ordinate...

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  3. If |bar(u)|=2 and bar(u) makes angles of 60^(@) and 120^(@) with OX a...

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  11. The number of lines which are equally inclined to the axes is :

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  13. Direction Cosines of a normal to the XOY - plane are

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  15. A mirror and a source of light are situated at the origin O and at a...

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  17. The graph of the equation x^2+y^2=0 in the three dimensional space is ...

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  18. If the line OP of length r makes an angle alpha with the X - axis , an...

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