Question # 1

The set {1, -1, i, -i}, form a group under

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addition

multiplication

subtraction

None

Which of the following is the solution of Cot²x = 1/√3

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π/5

π/3

π/7

π/9

The number of real roots in cube roots of 8 is ?

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n x m

m x n

km x n

m x kn

If x lies in {0, 2π} and Cosec x = 2 then x =

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π/ 6 and 5π/6

π +2nπ

nπ

2π/3 and π/3

Period of Sin 2x =

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π

4π

2nπ

2π

Sin-1 (√2/2)=?

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π/2

π/3

3π/4

2π

If a cone is cut by a plane perpendicular to the axis of the cone then the section is a

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Parabola

Circle

Hyperbola

Ellipse

The radius of the circle (x- 1)² + (y + 3)² =64 is

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8

2√2

4

64

The curves y =x², y= x interest at

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(0,0) ,(1,1)

(2,4)

(0,),(2,4)

(0,3),(-1,1)

If Z₁ = 1+i, Z₂ = 2+3i, then |Z₂-Z₁|=?

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√3 I

√7

-2-1

√5

If A and B are two events then P(A∪B) =? (when A and B are disjoint)

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P(A) - P(B)

P(A) x P(B)

P(A) + P(B)

P(A) + P(B) -P(A∩B)

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