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!(Wink)

Quote:

---

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!(Wink)

---

Sorry, but what is the exact question?

Quote:

---

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? (Wondering)
Than mate(Nod)