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Using properties of determinants, prove...

Using properties of determinants, prove the following: `|[1,x,x^2],[x^2, 1,x],[x,x^2,1]|=(1-x^3)^2`

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To prove that \[ \left| \begin{array}{ccc} 1 & x & x^2 \\ x^2 & 1 & x \\ x & x^2 & 1 \end{array} \right| = (1 - x^3)^2, ...
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Without expanding, show that the value of each of the determinants is zero: |[(2^x+2^(-x))^2, (2^x-2^(-1))^2, 1] , [(3^x+3^(-1))^2, (3^x-3^(-x))^2, 1] , [(4^x+4^(-x))^2, (4^x-4^(-x))^2, 1]|

Prove the following: tan^(-1)x+tan^(-1)((2x)/(1-x^2))=tan^(-1)((3x-x^3)/(1-3x^2))

Prove the following: tan^(-1)x+tan^(-1)((2x)/(1-x^2))=tan^(-1)((3x-x^3)/(1-3x^2))

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XII BOARD PREVIOUS YEAR PAPER ENGLISH-BOARD PAPER SOLUTIONS-All Questions
  1. If a matrix has 5 elements, write all possible orders it can have.

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  2. If A=[[2, 3],[ 5,-2]], write A^(-1) in terms of A

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  3. Using properties of determinants, prove the following: |[1,x,x^2],[...

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  4. Write the projection of the vector hat i- hat j on the vector ha...

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  5. Write the direction-cosines of the line joining the points (1, 0, 0...

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  6. Differentiate the following function with respect to x : (log\ x)^...

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  7. If y=log[x+sqrt(x^2+a^2)\ ] , show that (x^2+a^2)(d^2\ y)/(dx^2)+x(dy)...

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  8. Evaluate: int1^3(x^2+x)dx

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  9. Show that of all the rectangles inscribed in a given fixed circle, ...

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  10. Using integration find the area of the triangular region whose side...

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  11. Find the equation of the plane which contains the line of intersecti...

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  12. Find a unit vector perpendicular to each of the vector vec a+ vec ...

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  13. Find the angle between the following pair of lines: (-x+2)/(-2)=(y-...

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  14. Probabilities of solving a specific problem independently by A and ...

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  15. If x=a^(sin^-1 t) ,\ y=a^(cos^-1t) ,\ show that (dy)/(dx)=-y/x

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  16. Find the point on the curve y=x^2 where the slope of the tangent is eq...

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  17. Find the intervals in which the function f given by f(x)=sinx+cosx ,\...

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  18. A factory makes tennis rackets and cricket bats. A tennis racket ta...

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  19. Suppose 5% of men and 0.25% of women have grey hair. A grey haired ...

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  20. 2 tan^(-1) (cos x) = tan^(-1) (2 cosec x)

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