definite integral

[man111]

Calculate Value of \int_{0}^{\pi}\frac{x\tan nx}{\sec x+\cosec x}dx

Do not forget to put a backslash before a standard function name. Compare $secx$

$sec x$

and $\sec x$

$\sec x$

[moscwicz]

Предупреждение за искажение ника и оффтоп.

(Оффтоп)

man111 в сообщении #384958 писал(а):

TeX improved, suggestions added

zhoraster, писать надо TeX HAS BEEN improved
suggestions HAVE BEEN added