Use identity .
Thus, open parantheses,
Thus, all non-cotermial angles are, (use the arcsin)
I saw that you made multiple posts on the topic of trigonometry. I do not think you want to "spam" the forum. I would allow it, but be careful and do not start asking the same question everywhere, because then we, the moderators, have to waste time deleting them. CaptainBlack already banned a person for 1 day for doing "spamming".
I would not have banned them for posting the same question to multipleOriginally Posted by ThePerfectHacker
fora, at most I may have deleted all but one.
The person in question posted exactly the same message 5 times (and may
have been still posting copies when I banned them), and the message was
not a question but publicity for their web site (admittedly mathematical).
As it is I have left one copy of their message online.
I must confess to being touchy about spam on message boards, and if I
have the ability to stop it I will. I have seen enough good sites ruined by