Name

**Functions of 0º**
Graphic	function	function	function
	$\sin 0^\circ=\frac{0}{a}=0\,$	$\cos 0^\circ=\frac{a}{a}=1\,$	$\tan 0^\circ=\frac{0}{a}=0\,$
	$\cot 0^\circ=\frac{a}{0}=\infty\,$	$\sec 0^\circ=\frac{a}{a}=1\,$	$\csc 0^\circ=\frac{a}{0}=\infty\,$

**Functions of 90º**
Graphic	function	function	function
	$\sin 90^\circ=\frac{a}{a}=1\,$	$\cos 90^\circ=\frac{0}{a}=0\,$	$\tan 90^\circ=\frac{a}{0}=\infty\,$
	$\cot 90^\circ=\frac{0}{a}=0\,$	$\sec 90^\circ=\frac{a}{0}=\infty\,$	$\csc 90^\circ=\frac{a}{a}=1\,$

**Functions of 180º**
Graphic	function	function	function
	$\sin 180^\circ=\frac{0}{a}=0\,$	$\cos 180^\circ=\frac{-a}{a}=-1\,$	$\tan 180^\circ=\frac{0}{-a}=0\,$
	$\cot 180^\circ=\frac{-a}{0}=\infty\,$	$\sec 180^\circ=\frac{a}{-a}=-1\,$	$\csc 180^\circ=\frac{a}{0}=\infty\,$

**Functions of 270º**
Graphic	function	function	function
	$\sin 270^\circ=\frac{-a}{a}=-1\,$	$\cos 270^\circ=\frac{0}{a}=0\,$	$\tan 270^\circ=\frac{-a}{0}=\infty\,$
	$\cot 270^\circ=\frac{0}{-a}=0\,$	$\sec 270^\circ=\frac{a}{0}=\infty\,$	$\csc 270^\circ=\frac{a}{-a}=-1\,$

**Functions of 360º**
Graphic	function	function	function
	$\sin 360^\circ=\frac{0}{a}=0\,$	$\cos 360^\circ=\frac{a}{a}=1\,$	$\tan 360^\circ=\frac{0}{a}=0\,$
	$\cot 360^\circ=\frac{a}{0}=\infty\,$	$\sec 360^\circ=\frac{a}{a}=1\,$	$\csc 360^\circ=\frac{a}{0}=\infty\,$

**Trigonometric functions of quadrant angles**
Angle (grades)	Angle (radians)	sin	cos	tan	cot	sec	csc
$0^\circ\,$	$0\,$	$0\,$	$1\,$	$0\,$	$\infty\,$	$1\,$	$\infty\,$
$90^\circ\,$	$\frac{\pi}{2}\,$	$1\,$	$0\,$	$\infty\,$	$0\,$	$\infty\,$	$1\,$
$180^\circ\,$	$\pi\,$	$0\,$	$-1\,$	$0\,$	$\infty\,$	$-1\,$	$\infty\,$
$270^\circ\,$	$\frac{3\pi}{2}\,$	$-1\,$	$0\,$	$\infty\,$	$0\,$	$\infty\,$	$-1\,$
$360^\circ\,$	$2\pi\,$	$0\,$	$1\,$	$0\,$	$\infty\,$	$1\,$	$\infty\,$