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

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

so arcsin of infinity is pi/2?

How is that figured?

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

You mean to use the inverse tangent function, but ask yourself, what is $\tan\left(\frac{\pi}{2} \right)$?

3. ## 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?

4. ## Re: why is arcsin of t = to pi/2?

Yes, that is spot on!