Trigonometric Functions

Let S= \ (-2 , 2 ) : +1= 3 \. Then S is equal to :

1. - 2 3
2. - 4 3
3. 2 3
4. 4 3

Let A, B, where A, B (- 2, 2 ), be the roots of the quadratic equation x2-2x-5=0. Then 20 2 ( A+B2 ) is equal to :

1. 10+ 10
2. 10-2 10
3. 10-3 10
4. 10- 10

The sum of all the integral values of p such that the equation 3 2 x+12 x-3=p, x R, has at least one solution, is:

1. -54
2. -60
3. -75
4. -84

If S= \ [- , ] : . . 5 2= 7 7 2 \, then n(S) is equal to .

If A= 3 9 + 9 27 + 27 81 and B= 81 - 3 , then BA is equal to .

If ( 18 ) ( 5 18 ) ( 7 18 )=K, then the value of ( 10K 3 ) is :

1. 3+12 2
2. 3-1 2
3. 32
4. 12

Let S=\x [- , ] : x( x+ x)=a, a Z\. Then n(S) is equal to :

1. 3
2. 6
3. 7
4. 9

Let P=\ [0, 4 ] : 2 1\ and S=\a Z : 2( 8 - 8 ) 2 =a2, P\. Then n(S) is:

1. 0
2. 1
3. 2
4. 3

If (A - B) A + 2 C 2 A = 1, A, B, C (0, 2 ), then

1. A, C, B are in A.P.
2. A, C, B are in G.P.
3. A, B, C are in G.P.
4. A, B, C are in A.P.

The sum of all the elements in the range of f(x) = Sgn( x) + Sgn( x) + Sgn( x) + Sgn( x), x n 2, n Z, where Sgn(t) = cases 1, & if t > 0 \ -1, & if t < 0 cases is :

1. 4
2. 0
3. 2
4. -2