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Write the value of ( hat ixx hat j)dot h...

Write the value of `( hat ixx hat j)dot hat k+( hat jxx hat k)dot\ hati`

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XII BOARDS PREVIOUS YEAR-BOARD PAPER SOLUTIONS-All Questions
  1. If x=a(cos t+tsint) and y=a(sint-tcost), then find (d^2y)/(dx^2)

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  2. Write the value of the are of the parallelogram determined by the v...

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  3. Write the value of ( hat ixx hat j)dot hat k+( hat jxx hat k)dot\ hat...

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  4. Prove that the relation R in the set A={5,6,7,8,9} given by R={(a , b)...

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  5. If log (x^2+y^2)=t a n^(-1)\ (y/x), then show that (dy)/(dx)=(x+y)/(x-...

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  6. Prove that tan^-1((cosx)/(1+sinx))=pi/4-x/2,\ x in (-pi/2,pi/2)

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  7. Using integration, find the area of the following region : {(x , y...

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  8. Using integration, find the area of the region bounded by the lines...

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  9. If C=0.003x^3+0.02x^2+6x+250 gives the amount of carbon pollution in a...

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  10. Prove that sin^(-1)(8/(17))+sin^(-1)(3/5)=cos^(-1)((36)/(85))

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  11. Evaluate: int0^(pi//2)(2logsinx-logsin2x)dx

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  12. Find the point on the curve y=x^3-11 x+5 at which the equation of tang...

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  13. Using differentials, find the approximate value of sqrt(49. 5)

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  14. Using properties of determinants, prove the following: |a^2a b a c a ...

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  15. The probabilities of two students A and B coming to the school in t...

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  16. Show that the lines vec r=3 hat i+2 hat j-4 hat k+lambda( hat i+2 ha...

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  17. Find the particular solution of the differential equation satisfyin...

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  18. Find the general solution of the differential equation xlogx\ dot(...

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  19. If x=acos^3theta and y=asin^3theta, then find the value of (d^2y)/(...

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  20. If y="sin"(logx), then prove that (x^2d^2y)/(dx^2)+x(dy)/(dx)+y=0

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