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If xy = 1 + a^2 then show that, tan^(-1)...

If xy = `1 + a^2` then show that,
`tan^(-1) [1/(a + x)]+tan^(-1) [1/(a+y)] = tan^(-1)[1/a],x + y + 2a ne 0`.

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UNITED BOOK HOUSE-SET 14-EXERCISE
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  3. For three mutually exclusive events X,Y and Z it is given that P(x) = ...

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  4. A discrete random variable X has the following distribution: find a.

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  5. If xy = 1 + a^2 then show that, tan^(-1) [1/(a + x)]+tan^(-1) [1/(a+y)...

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  6. By using properties of determinants. Show that: |1+a^2-b^2; 2ab; -2b: ...

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  8. If y= (tan^(-1)x)^2, then show that (1+x^2)^2(d^2y)/(dx^2)+2x(1+x^2)(d...

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  9. Prove that, int(cos 5x + cos4x)/(1-2cos 3x)dx= -(1/2 sin2x + sinx)+c

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  10. Solve:(dy)/(dx)=(3x + 4y+1)/(-4x+2y-3)

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  11. Solve:(x^2-1)(dy)/(dx) + 2xy = 2/(x^2-1)

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  12. vec a = hati +hatj + hatk and vecb = -2hati +hatj +2hatk represent two...

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  13. Find the vector alpha which is perpendicular to both 4 hati + 5hatj -...

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  14. Show that: overset(1)underset(0)int (log(1+x)/(1+x^2))dx= pi/8 log 2.

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  15. Evaluate:underset(n rarr infty)lim 1/n[sin (pi/(2n)) +sin((2pi)/(2n))+...

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  17. A random variable X has the following probability function: Find P(x ...

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  18. A random variable X has the following probability function: Calculate...

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