#### Maths MCQS for NTS

Cos

^{-1}x =?/2 – sin

^{-1}x? + sin

^{-1}x?/2 +sin

^{-1}x? = sin

^{-1}xSin-1 [-1/2] = ______.

-?/3

-?/6

?/3

?/6

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

30

20

40

50

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

? +2n?

?/ 6 and 5?/6

n?

2?/3 and ?/3

Period is Tan x/5 is

5?

4?

2?

?/5

The line joining (1,3) to (a,b) has unit gradient then

2a + 3b =1

a-b =-2

A-b =5

a+b = 0

Cos

^{-1}(-x) =_______.? +sin

^{-1}x? -sin

^{-1}x? +cos

^{-1}x? -cos

^{-1}xIf in isosceles right angled triangle one side is a then hypotenuse is

a

Cannot be determined by given

a?2

a/2

Sin

^{-1}(-x) =-Sin

^{-1}X1/sin-1x

Sin

^{-1}1/xCos

^{-1}1/xThe set {1, -1, i, -i}, form a group under

addition

subtraction

None

multiplication

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