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If (1-i)/(1+i)=x+iy, then x^2+y^2 is equ...

If `(1-i)/(1+i)=x+iy`, then `x^2+y^2` is equal to:

A

1

B

-1

C

0

D

none of these

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JBD PUBLICATION-MODEL PAPER (9)-EXERCISE
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  2. The number of real solutions of the equations cos^7x+sin^4x=1 in the i...

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  3. If (1-i)/(1+i)=x+iy, then x^2+y^2 is equal to:

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  4. The number of permutations of all letters of word 'EXERCISES' is:

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  5. If sum n=210, then sum n^2 is equal to:

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  6. Slope of the line which cuts off intecepts of equal length on the axis...

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  7. The equation of circle having centre (0,0) and area 154 sq. units.

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  8. underset(xrarr0)lim (sqrt(1+x)-1)/x is equal to:

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  9. Six boys and six girls sit in a row randomly. The probability that the...

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  10. If costheta+sintheta=sqrt2costheta ,then show that costheta-sintheta=...

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  11. An angle alpha is divided into two parts such that ratio of the tangen...

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  12. Express (5 - 3i)^3 in the form a + ib .

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  13. If the 2nd , 3nd and 4th terms in the expansion of (x + y)^(n) are...

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  14. Find the middle terms in the expansion of (3-x^(3)/6)^(7)

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  15. Three vertices of parallelogram ABCD are A(3,-1,2), B(1,2,-4), C(-1,1,...

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  16. Write down the truth value of the following: The number 19 is prime.

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  17. Write down the truth value of the following: Every square is a rectang...

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  18. Write the contra positive of the following statements: If you are born...

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  19. Contrapositive of the statement If a number is divisible by 9. then it...

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  20. Let A and B be two non empty sets, then show that AxxB=BxxA. If A=B

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