Upgrade subject to access all content

Which one of the following is not equivalent to $\text{sin x}$?

$\cfrac{1}{\text{csc x}}$

$(\text{cos x})(\text{tan x})$

$\text{2 sin x – sin x}$

$\text{1 - cos x}$

$\text{(tan x)(sin x)(cot x)}$