Mark the correct alternative in the following:

If f(x) = cos (log x), then has the value

Mark the correct alternative in the following:

Which one of the following is not a function?

Mark the correct alternative in the following:

If f(x) = cos (log x), then has the value

Mark the correct alternative in the following:

Let f(x) = |x – 1|. Then,

Mark the correct alternative in the following:

The range of f(x) = cos [x], for -π/2< x <π/2 is