Trigonometry Values Pi

$\displaystyle \sin\pi$	$\textstyle =$	$\displaystyle 0$	(1)
$\displaystyle \cos\pi$	$\textstyle =$	$\displaystyle -1$	(2)
$\displaystyle \tan\pi$	$\textstyle =$	$\displaystyle 0$	(3)
$\displaystyle \csc\pi$	$\textstyle =$	$\displaystyle \infty$	(4)
$\displaystyle \sec\pi$	$\textstyle =$	$\displaystyle -1$	(5)
$\displaystyle \cot\pi$	$\textstyle =$	$\displaystyle \infty.$	(6)