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In a unit cube. Find The angle between a...

In a unit cube. Find The angle between a diagonal of a cube and the diagonal of a face of the cube

A

`cos^(-1)((1)/(3))`

B

`cos^(-1)((1)/(sqrt(3)))`

C

`cos^(-1)sqrt((2)/(3))`

D

`cos^(-1)""(2)/(3)`

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AAKASH SERIES-DIRECTION COSINES & RATIOS-EXERCISE - II
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  2. If the angle between the lines whose direcrtion cosines are (-(2)/(sqr...

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  3. Any point on a line has the coordinates (r+1, r-3, rsqrt(2)+4) where r...

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  4. If (l(1),m(1),n(1)),(l(2),m(2),n(2)) are d.c's of two lines then find ...

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  5. If the vertices of a triangle are (1,4,2),(-2,1,2),(2,3,-4) then the a...

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  6. The angle between the lines joining the points (1,1,0), (-3, sqrt(3) +...

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  7. If (a(1),b(1),c(1)),(a(2),b(2),c(2)) are direction ratio of two lines ...

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  8. The angle between any two diagonals of a cube is

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  9. In a unit cube. Find The angle between a diagonal of a cube and the di...

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  10. Angle between a diagonal of a cube with edge of lenth 1 is

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  11. If a line makes angles alpha, beta, lambda,delta with the four diagon...

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  12. If a line makes angles alpha,beta,lambda,delta with the 4 diagonals of...

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  13. If the edges of rectangular parllelopiped are 3,2,1 then the angle bet...

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  14. If (l(1),m(1),n(1)),(l(2),m(2),n(2)) are d.c's of two lines whose angl...

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  15. If the d.r.s of the two lines are 1,1,2, -1,2,1 then d.c.s of a line w...

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  16. If the d.r.s of OA, OB are (1,1,-1),(1-2,1) then the d.c.s of the norm...

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  17. If (1,2,1), (1,-3,2) are the direction ratios of two lines and (l, m,n...

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  18. If the d.r's of the lines are 2,1,-2 and 3,-2,6 then the d.r,s of the ...

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