.htaccess quick question

i can't get a straight answer out of anybody, so sorry to ask, i know i just going to get told to kill myself, but how do i modify my .htaccess file to never show .html or .php
as in instead of mechanicalape.com/contact.php
getting just mechanicalape.com/contact

are
RewriteRule ^(.*)\.htm$ $1.php [nc]
or
AddHandler application/x-httpd-php5
the way to go?

RewriteEngine On    
RewriteRule ^/about$ /about
RewriteRule .*\.(php|html)$ [NC]
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