There is not cos2 button on a TI-83 plus. You will need to enter the cosine function and then square it. (Press the x2 button to get the squared function.) To type cos2(90) on a TI-83 plus, for example, type: cos(90)2
-2
The TI-83 series was released in 1996.
No, in order to download apps to your TI-83, you need a cable that connects your calculator and the computer, or a cable to connect to another TI-83.
The TI-84 is a graphing calculater. It is mostly just an update to the TI-83 calculater.
Yes
Some of the features of the TI-83 Plus, are: upgradable operating system and software; preloaded apps; compatible with TI-84 Plus and TI-84 Plus Silver Edition.
"http://wiki.answers.com/Q/How_do_you_put_games_on_the_TI-83"
There isn't a sec key on the TI-83 Plus. Secant is 1/cosine, which is what is used to find secant on a TI-83 Plus. For example, to find the secant of 4, enter 1/sec(4).
graphing calculators only. TI-83 and TI-84 calculators.
Yes, you can download an emulator for the TI-83 calculator on a PC. Emulators simulate the functionality of the calculator, allowing you to run its software and perform calculations just like on the actual device. Popular TI-83 emulators include TI-83 Plus Emulator and WabbitEmu. Just be sure to check for compatibility with your operating system and any necessary ROM files.
yes