# why is arcsin of t = to pi/2?

• October 22nd 2012, 06:33 PM
kingsolomonsgrave
why is arcsin of t = to pi/2?
Attachment 25353

so arcsin of infinity is pi/2?

How is that figured?
• October 22nd 2012, 06:38 PM
MarkFL
Re: why is arcsin of t = to pi/2?
You mean to use the inverse tangent function, but ask yourself, what is $\tan\left(\frac{\pi}{2} \right)$?
• October 22nd 2012, 06:42 PM
kingsolomonsgrave
Re: why is arcsin of t = to pi/2?
oh i see now! tan goes to infinity at pi/2 and negative infinity at -pi/2 so the inverse tan of infinity is therefore pi/2

and the inverse tan of negative infinity would be -pi/2

is that right?
• October 22nd 2012, 06:52 PM
MarkFL
Re: why is arcsin of t = to pi/2?
Yes, that is spot on! :)