$Cosx$

$Cos2x$

$Cos(\frac{x}{2})$

$Cos(2x)$

$Cosx$

$Cos(\frac{x}{2})$

$Cos3x$

$Cos2x$

$Cos(x)$

$Sinx$

$Cos(x)$

$\cos(\frac{x}{2})$

$Sinx$

$Cos2x$

$Cos(x)$

$Cosx$

$Cos2x$

$\cos(\frac{x}{2})$

$Cos2x$

$Cos(x/2)$

$Cosx$

$Cos2x$

$\cos\left(\frac{x}{2}\right)$

$Cosx$

$\cos2x$

$Cos(\frac{x}{2})$

$Cosx$

$\cos2x$

$\sin(\frac{x}{2})$