Question # 1

The exact value of cos^-1 (-1) + cos^-1(1) =

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π

-π

π/2

π/3

A function whose domain is a subset of natural numbers is called ______

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Identity function

Sequence

Onto function

Series

If a (p + q)²+ bpq +c = 0 and a (p + r)²+ 2 bpr + c = 0, then qr equals

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p²+ c/a

p²+ a/c

p²+ c/a

p²- c/a

The value of x and y when (x + iy)2 = 5 - 4i

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x = 2, y = -1

x = -2, y = 1

x = 2, y = -i

x = 2, y = 2

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0 (zero) is

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An irrational number

A rational number

A negative integer

A positive number

The foot of perpendicular from (α,β,γ) only y-axis is

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(α, 0, 0)

(0,β, 0)

(0, 0, γ)

(0, 0, 0)

A quadratic equation has two

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roots

degree

variables

constants

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sin (α +β)=

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sinαcosβ- cosαsinβ

sinαcosα- cosβsinβ

sinαcosα+ cosβsinβ

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