# Thread: Finding the exact value using CAS

1. ## Finding the exact value using CAS

Hi all

Is there anyway to find th exact value using ti-89?
I mean without using these two triangles...

THANKS!

2. Originally Posted by User Name
Hi all

Is there anyway to find th exact value using ti-89?
I mean without using these two triangles...

THANKS!
Sorry, but what is the exact question?

3. Originally Posted by earboth
Sorry, but what is the exact question?
Hi man, the exact question is asking to find equation for the tangent and the normal for this:
Y=3Cos(x/2) while the X= pie

is any tricks to do in on CAS without going so far?
Than mate