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Solve for x: 2tan^(-1)(cosx)=tan^(-1)(...

Solve for `x:` `2tan^(-1)(cosx)=tan^(-1)(2cos e cx)`

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XII BOARDS PREVIOUS YEAR-BOARD PAPER SOLUTIONS-All Questions
  1. The sum of the perimeters of a circle and a square is k , where k is s...

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  2. Find the direction cosines of the line (x+2)/2=(2y-7)/6=(5-z)/6dot Als...

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  3. Solve for x: 2tan^(-1)(cosx)=tan^(-1)(2cos e cx)

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  4. Using differentials, find the approximate value of (3. 968)^(3/2)

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  5. Write the derivative of sinx w.r.t. cosxdot

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  6. Find : int(sin^2x-cos^2x)/(sin^2xcos^2x)dx

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  7. Write a vector in the direction of the vector hat i-2 hat j+2 hat k t...

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  8. Write the distance of a point P(a ,b ,c) from x-axis.

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  9. If, [xdoty4z+6x+y]=[8w0 6], write the value of (x+y+z)dot

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  10. Write the principal value of cos^(-1)[cos(680^@)]

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  11. Let R be the equivalence relation in the set A={0,\ 1,\ 2,\ 3,\ 4,\ 5}...

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  12. Write a x2x matrix which is both symmetric and skew-symmetric.

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  13. Write the projection of the vector 2 hat i- hat j+ hat k on the vector...

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  14. int[x+3]/sqrt[5-4x-x^2].dx

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  15. Evaluate : int0^(pi/2)x^2sinxdx

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  16. If the three vectors veca, vecb , vecc are coplanar, prove that the ve...

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  17. If vec a=2 hat i-3 hat j+ hat k , hat b=- hat i+ hat k , vec c=2 hat ...

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  18. If y(x) is a solution of the differential equation ((2+sinx)/(1+y))...

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  19. If x=a(cost+tsint)a n d y=a (sin t - t cos t), then find the value of ...

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  20. If (x-y)dote^(x/(x-y))=a , Prove that y(dy)/(dx)+x=2ydot

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