The hybridisation of $Xe$ and the number of lone pairs of electrons on it in $XeF_6$ are

The function $f: R \rightarrow R$ is defined by $f(x) = \cos^2 x + \sin^4 x$ for $x \in R$. Then the range $f(R)$ is equal to

$A$ particle moves in a straight line with retardation proportional to its displacement. Its loss of kinetic energy for any displacement $x$ is proportional to:

If $f: R \rightarrow C$ is defined by $f(x)=e^{2 i x}$ for $x \in R$, then $f$ is (where $C$ denotes the set of all complex numbers)

Which of the following lubricates ligaments or tendons and is an important constituent of synovial fluid of bones?

Which one of the following statements is correct?