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If C is the reflection of A (2, 4) in x-...

If C is the reflection of A (2, 4) in x-axis and B is the reflection of C in y-axis, then `|AB|` is

A

20

B

`2sqrt5`

C

`4sqrt5`

D

4

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Point P(2,3) goes through following transformations in successtion: (i) reflection in line y=x (ii) translation of 4 units to the right (iii) translation of 5 units up (iv) reflection in y-axis Find the coordinates of final position of the point .

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If a line makes an angle of pi/4 with the positive direction of each of x-axis and y-axis, then the angel that the line makes with the positive direction of the z-axis is a. pi/3 b. pi/4 c. pi/2 d. pi/6

If [4a2 4a 1 4b2 4b 1 4c2 4c 1] [f-1 f1 f2] = [3a2 + 3a 3b2 + 3b 3c2 + 3c] fx is a quadratic function and its maximum value occurs at a point V. A is a point of intersection of y = f x with x-axis and point .B is such that chord AB subtends a right angled at V. Find the area enclosed by fx and chord AB.

A ray of light passing through the point A(1,2) is reflected at a point B on the x-axis and then passes through (5,3). Then the equation of AB is:

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2009-MULTIPLE CHOICE QUESTIONS
  1. Center of the circle x^(2) + y^(2) - 6x + 4y - 12 = 0 is -

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  2. If A^(2)-A+I=0 then the inverse of the matrix A is

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  3. If C is the reflection of A (2, 4) in x-axis and B is the reflection o...

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  4. The value of cos15^(@)cos7(1^(@))/(2)sin7(1^(@))/(2) is

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  5. The value of integral int(-1)^(1)(|x+2|)/(x+2)dx is

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  6. The line y=2t^(2) intersects the ellipse (x^(2))/(9)+(y^(2))/(4)=1 in ...

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  7. General solutio of sin x+cos x=min(a in R) {1,a^(2)-4a+6} is

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  8. If A and B ar square matrices of the same order and AB=3I, =then A^(-...

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  9. The co-ordinates of the focus of the parabola described paraetrically...

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  10. For any two sets A and B, A-(A-B) equals

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  11. If a=2sqrt2,b=6,A=45^(@) then

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  12. A Mapping from IN to N is defined as follows: f:lNtolN f(n)=(n+5)^(...

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  13. If in a triangle ABC,sin^2A+sin^2B+sin^2C=2 then the triangle is alway...

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  14. int(dx)/(sinx+sqrt3cosx)

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  15. The value of (1+cospi//6)(1+cospi//3)(1+cos2pi//3)(1+cos7pi//6) is

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  16. If P=(1)/(2)sin^(2)theta+(1)/(3)cos^(2)theta then

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  17. int(dx)/(sinx+cosx) equals

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  18. If f(x)=f(a-x) then int(0)^(a)xf(x)dx is equal to

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  19. The value of int(0)^(prop)(dx)/((x^(2)+4)(x^(2)+9)) is

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  20. If I(1)int(0)^(pi//4)sin^(2)xdx and I(2)=int(0)^(pi//4)cos^(2)xdx, the...

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