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- integral from minus to plus infinity of tan^2 x
∫tan^2 x ( -infinity to +infinity)
If it's homework, and you would like help, we would like to help you with your homework in order to help you to learn; however, we don't want to just plain do it for you ##-## as @suremarc indicated, you should make and show an attempt ##-## and please use ##\mathrm {\LaTeX}## ##-## if it's not homework, please let us know ##-## your reply that included your saying "it appeared as part of a sum in quantum mechanics" leaves whether it's homework or not as something of a curiosity ##\dots##Thank you for the reply, it appeared in a part of sum in quantum mechanics.
P.S. I am new to Physics forum. Sorry, not used to its norms
Thanks for inputs!