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The locus of the centre of a circle whic...

The locus of the centre of a circle which passes through two variable points (a, 0), (-a, 0) is:

A

`x=1`

B

`x+y=a`

C

`x+y=2a`

D

`x=0`

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2011-MULTIPLE CHOICE QUESTIONS
  1. The equation 8x^2+12y^2-4x + 4y-1=0 represents

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  2. If the straight line y=mx lies outside of the circle x^(2)+ y^(2) - 20...

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  3. The locus of the centre of a circle which passes through two variable ...

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  4. The coordinates of the two points lying on x + y = 4 and at a unit dis...

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  5. The intercept oil the line y = x by the circle x^2 + y^2 - 2x = 0 is A...

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  6. If the coordinates of one end of a diameter of the circle x^(2) + y^(2...

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  7. If the three points A(1,6), B(3,-4) and C(x,y) collinear then the equ...

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  8. If sin theta = (2t)/(1+t^(2)) and theta lies in the second quadrant, t...

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  9. The solution set of the inequation cos^(-1)x lt sin^(-1)x is:

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  10. The number of solutions of 2 sinx + cosx =3 is:

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  11. Let tan alpha = a/(a+1) and tan beta =1/(2a +1), then alpha + beta is:

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  12. If theta + phi =pi//4, then (1+tan theta)(1+tan phi) is equal to:

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  13. If sin theta and cos theta are the roots of the equation ax^2 - bx +...

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  14. If A and B are two matrices such that A + B and AB are both defined, t...

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  15. If A=[{:(3,x-1),(2x+3, x+2):}] is a symmetric matrix, then the value o...

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  16. If Z=|{:(1,1+2i , 5i),(1-2i, -3, 5+3i),(5i, 5-3i, 7):}|, then (i =sqrt...

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  17. The equation of the locus of the point of intersection of the straight...

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  18. If sin theta + cos theta=0 and 0 lt theta lt pi, then theta=

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  19. The value of cos 15^(@) - sin 15^(@) is:

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  20. the period of the function f(x) = cos 4x + tan 3x is:

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