I have a wordpress site. Which has the built-in login form with the url http://domain/wp-login.php and register page http://domain/wp-login.php?action=register.
As these pages have no sidebar and headers, therefore I want to display these forms on a page which I have created from the backend.
Is it possible and how will I do this?
There are a couple of ways to do this. The most simple is probably to install a plugin, such as Theme My Login. The more complicated but flexible way to do it is to use
wp_login_form() to output the form, presumably to a shortcode or something, and then you can style it yourself.