Special Values of the Trigonometric functions

       

`theta=`	0	`pi/6`	`pi/4`	`pi/3`	`pi/2`	`pi`
`sin theta`	0	`sqrt(1)/2`	`sqrt(2)/2`	`sqrt(3)/2`	`sqrt(4)/2`	0
`cos theta`	`sqrt(4)/2`	`sqrt(3)/2`	`sqrt(2)/2`	`sqrt(1)/2`	0	-1
`tan theta`	0	`1/sqrt(3)`	1	`sqrt(3)`	un	0