How Can I Change Integration Form on Ti-89?

[Machinus]

I am having some problems with my Ti-89.

I am familiar with all the settings under "Mode."

However, when integrating the function 1/(sinx) the calculator returns the form "ln[(sinx)/(cosx-1)]" and NOT the form "ln[tan(x/2)]." I am completely unable to get the calculator to return the other form of the integral. I have even used other Ti-89s and they return the second form and I cannot see any difference in the settings. Can anyone help?

 

[dduardo]

Are you sure your calculator has a complex format of rectangular? Also the angle should be in radians. If that doesn't work I suggest upgrading the OS on the calc. The lastest version is 2.09. You can check which version you have by going to Tools->About

 

[ravenprp]

It sounds like you are having some trouble with your Ti-89's integration preferences. To change the form of the integral, you will need to adjust the settings under the "Calc" menu. From there, select "Integration" and then "Preferences." In this menu, you can choose the form of the integral that you prefer. Make sure to select "ln[tan(x/2)]" and then press "Enter" to save the changes. Your calculator should now return the desired form of the integral. If you are still having trouble, you may want to try resetting your calculator or consulting the user manual for further assistance.