Question # 1

If i,m,n are the direction cosines of a vector O̅P̅ then

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I² + m² + n² =0

I² - m² + n² =1

I² + m² + n² =1

I² + m² - n² =0

Domain of Cosecθ is

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is R but θ= nπ

is R but θ ≠ nπ

is R but θ ≠ 2nπ

is R but θ ≠ nπ/2

If A = [a_ij] and b = [b_ij] are the matrices of the order 3x3 then A-B=

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Circle

Ellipse

Parabola

Hexagon

The multiplicative inverse of -1 in the set {1-,1} is

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40

30

50

20

If a rectangle has an area 81x² and length of 27x. then what is its width?

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3x

9x

3x²

9x²

If y = (ax)^m + b^m, then dy/dx equals

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m (ax)^m x^m-1

ma^m x^m-1

m a^m x^m-1

m a^m x^m-2

An m x n matrix is said to be rectangular if

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Forms a group w.r.t. addition

Non commutative group w.r.t. multiplication

Forms a group w.r.t. multiplication

Doesn't form a group

The two consecutive positive integers whose product is 56 are

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7, 8

14, 4

28, 2

56, 1

If x² +y² = 4, Then dy/dx =

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2x +2y

4 -x²

-x/y

y/x

Cos 315° =

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0.707

0.5

1

0

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NAT I General Science Mathematics MCQs With Answers

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