Question # 1

Geometric mean between a and b is

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The solution set of trigonometric equation contains

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one element

two elements

three elements

Infinite elements

If sin x + sin²x = 1, then the value of Cos¹²x + 3cos¹⁰x + 3cos⁸x + cos⁶x + 2 cos⁴x + cos²x-2 is equal to

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0

1

2

sin²x

The vertex of the parabola (xsin a -ycos a)2 =4a(xcos a +ysin a) lies at

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(acos a,asin a)

(a,0)

(cos a,sin a)

(0,0)

The set {-1, 1} is

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Group under the multiplication

Group under addition

Does not form a group

Contains no identity element

For any real numbers x,y,xy=o ⇒

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x ≠ 0 ∧ y ≠ 0

x = 0 ∨ y = 0

x = 0

y = 0

tan270° =__________;

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0

1

-1

Undefined

The sum of the odd coefficients in the expansion of (a + x)⁴is

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14

12

8

4

1 + 2 + 3 + ...... + n = ______

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n!

0!

1

None of these

i³ =

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-1

i

-i

1

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