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Write the principal value of tan^(-1)(1)...

Write the principal value of `tan^(-1)(1)+cos^(-1)(-1/2)`

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XII BOARD PREVIOUS YEAR PAPER ENGLISH-BOARD PAPER SOLUTIONS-All Questions
  1. The length x of a rectangle is decreasing at the rate of 5 cm/minute...

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  2. Find the intervals in which the function f given f(x)=\ sin x+cosx ,\...

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  3. Write the principal value of tan^(-1)(1)+cos^(-1)(-1/2)

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  4. Suppose a girl throws a dice. If she gets 5 or 6 she tosses a coin thr...

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  5. A dietician wishes to mix two types of foods in such a way that the...

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  6. Let vec(a)=hat(i)+4 hat(j)+2hat(k), vec(b)=3 hat(i)-2 hat(j)+7 hat(k) ...

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  7. Find the coordinates of the point where the line through the points...

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  8. Two cards are drawn simultaneously (without replacement) from a wel...

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  9. Using matrices, solve the following system of equations: 2x+3y+3z=5;...

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  10. Find the area of the region {(x , y)\ : x^2+y^2lt=4,\ x+y\ geq2}

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  11. If the lines (x-1)/(-3)=(y-2)/(-2k)=(z-3)/2 and (x-1)/k=(y-2)/1=(z-3)...

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  12. Sand is pouring from a pipe at the rate of12\ c m^3//s . The falling s...

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  13. Write the value of tan(2tan^-1(1/5)) .

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  14. Find (dy)/(dx)\ if (x^2+y^2)^2=x y

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  15. If y=3cos(logx)+4sin(logx),\ then show that x^2(d^2\ y)/(dx^2)+x(dy...

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  16. If x^m y^n=(x+y)^(m+n), prove that (dy)/(dx)=y/x .

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  17. Evaluate: int(3x-1)/((x+2)^2)\ dx

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  18. Evaluate: intx^2tan^(-1)x\ dx

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  19. If the binary operation "." on the set of integers Z , is defined by...

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  20. If int0^1(3x^2+2x+k)dx=0, find the value of k

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