Let f : R → R be a differentiable function having f (2) = 6, f′ (2) =(1/48) . Then 

• 24

• 36

• 12

• 12

Let f (x) be a non−negative continuous function such that the area bounded by the curve y = f (x), x−axis and the ordinates x = π/4  and x = β >  π/4  Then f (π/2) is

The value of 

• a π

• π/2

• π/a

• π/a

If 

• (sinα, cosα)

• (cosα, sinα)

• (- sinα, cosα)

• (- sinα, cosα)

27.  is equal to

• 
• 
• 
• 

The value of 

• 28/7

• 28/3

• 7/3

• 7/3

The value of 

• 0

• 1

• 2

• 2

If

• 0

• π

• π/2

• π/2