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Find the angle between the vectors ` vec a= hat i- hat j+\ hat k\ a n d\ \ vec b= hat i+\ hat j- hat k`

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Find the vector of magnitude 3, bisecting the angle between the vectors vec a=2 hat i+ hat j- hat k and vec b= hat i-2 hat j+ hat kdot

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Find a unit vector perpendicular to the plane containing the vectors vec a=2 hat i+ hat j+ hat k\ a n d\ vec b= hat i+2 hat j+ hat kdot

Find the angle between the vectors vec a\ a n d\ vec b where: vec a= hat i- hat j\ a n d\ vec b= hat j+ hat k

Find vec adot vec b when: vec a= hat i-2 hat j+ hat k\ a n d\ vec b=4 hat i-4 hat j+7 hat k

Find the angle between the planes vec rdot(2 hat i- hat j+ hat k)=6a n d vec rdot( hat i+ hat j+2 hat k)=5.

Find the angle between the vector vec(a) =2 hat(i) + 3hat(j) - 4 hat(k) and vec(b) = 4hat(i) +5 hat(j) - 2hat(k) .

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Column I, Column II The possible value of vec a if vec r=( hat i+ hat j)+lambda( hat i+2 hat i- hat k) and vec r=( hat i+2 hat j)+mu(- hat i+ hat j+a hat k) are not consistent, where lambdaa n dmu are scalars, is, p. -4 The angel between vectors vec a=lambda hat i-3 hat j- hat ka n d vec b=2lambda hat i+lambda hat j- hat k is acute, whereas vecrtor vec b makes an obtuse angel with the axes of coordinates. Then lambda may be, q. -2 The possible value of a such that 2 hat i- hat j+ hat k , hat i+2 hat j+(1+a)k a n d3 hat i+a hat j+5 hat k are coplanar is, r. 2 If vec A=2 hat i+lambda hat j+3 hat k , vec B=2 hat i+lambda hat j+ hat k , vec C=3 hat i+ hat ja n d vec A+lambda vec B is perpendicular to vec C then |2lambda| is, s. 3

For what value lambda are the vectors vec a=2 hat i+\ lambda hat j+ hat k\ a n d\ vec b= hat i-\ 2 hat j+3 hat k perpendicular to each other?

XII BOARD PREVIOUS YEAR PAPER ENGLISH-BOARD PAPER SOLUTIONS-All Questions
  1. Show that of all the rectangles inscribed in a given fixed circle, ...

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  2. Find a unit vector in the direction of vec a=3 hat i-2 hat j+6 hat...

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  3. Find the angle between the vectors vec a= hat i- hat j+\ hat k\ a...

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  4. If A=[(1, 2, 2),( 2, 1, 2), (2, 2, 1)], verify that A^2-4A-5I=0

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  5. A pair of dice is thrown 4 times. If getting a doublet is considered a...

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  6. Using properties of determinants, prove the following: \begin{vmatr...

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  7. If "f"("x")=x+7 and g(x)=x-7,\ x\ \in R , find (fog)(7).

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  8. Find the value of sin[pi/3 - sin^(-1) (- 1/2)]

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  9. Find the value of x\ and y\ if "2" [(1,3) ,(0,x)]+ "[(y ,0 ),(1 ,2)]...

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  10. Evaluate: |{:(" "a+ib,c+id),(-c+id,a-ib):}|

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  11. Find the cofactor of a(12) in the following: [(2,-3,5), (6 ,0 ,4), (...

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  12. Evaluate int(x^2)/(1+x^3)\ dx"

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  13. Evaluate : int0^1(dx)/(1+x^2)

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  14. A factory owner purchases two types of machines, A and B for his fac...

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  15. An insurance company insured 2000 scooter drivers, 4000 car drivers...

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  16. Evaluate: int(-a)^a\ sqrt((a-x)/(a+x))\ dx\ \

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  17. Find the equation of the plane passing through the point (3,4,1) an...

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  18. Find the shortest distance between the following lines: (x-3)/1=(y-5)/...

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  19. Find the point on the line (x+2)/3=(y+1\ )/2=(z-3\ )/2 at a distanc...

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  20. Evaluate : intsec^2(7-4x)dx

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