# The solution set of (5+4cosθ)(2cosθ+1) = 0 in the interval [0,2π],is

1.  {2π/3,5π/3}

2.  {2π/3,4π/3}

3.  {π/3,2π/3}

4.  {π/3,π}

4

{2π/3,4π/3}

Explanation :
No Explanation available for this question

# cos[cos-1(-1/7)+sin-1(-1/7)] is equal to

1.  -1/3

2.  0

3.  1/3

4.  4/9

4

0

Explanation :
No Explanation available for this question

# The sub-normal to the curve xy =c2 at any point varies directly as

1.  cube of the ordinates

2.  square of the ordinate

3.  ordinate

4.  none of these

4

none of these

Explanation :
No Explanation available for this question

# The minimum value of a2 sec2α + b2 cosec2α is

1.  a2-b2

2.  2(a2+b2)

3.  (a-b)2

4.  (a+b)2

4

(a+b)<sup>2</sup>

Explanation :
No Explanation available for this question

# If u = log (secx+secy+secz),Σ cot x (du/dx) is equal to

1.  4

2.  2

3.  3

4.  none

4

none

Explanation :
No Explanation available for this question

1.  1

2.  2

3.  3

4.  4

4

1

Explanation :
No Explanation available for this question

1.

2.  log a - log b

3.  log a + log b

4.

4

Explanation :
No Explanation available for this question

1.  Differentiable

2.  continuous

3.  Discontinuous

4.  none of these

4

continuous

Explanation :
No Explanation available for this question

# If y =emsin-1x,then (1-x2)y3-3xy2is

1.  my2

2.  (1+m2y)

3.  m2y1

4.  (1+m2)y1

4

(1+m<sup>2</sup>)y<sub>1</sub>

Explanation :
No Explanation available for this question

# The area enclosed by the parabola y2= 8x and the line y = 2x is

1.  4/3 sq units

2.  3/4 sq units

3.  1/4 sq units

4.  none of these

4