Hi Friends . Ever since I have encountered cosine squared on ti-83 plus at school I never seem to be able to learn it well. I am very good at all the other sections , but this particular section seems to be my weak point. Can some one help me in understanding it properly ?

Extra classes are no better than taking your routine classes. If you have a doubt, you need to makes an effort to get rid of it. I would not suggest tutoring, but would ask you to try Algebrator. It will surely solve your query concerning cosine squared on ti-83 plus to a large extent.

It is good to know that you wish to improve your math and are taking efforts to do so. I think you should try Algebrator. This is not exactly a tutoring tool but it provides solutions to math problems in a very descriptive manner. And the best thing about this software product is that it is very user friendly. There are a lot of demos given under various topics which are quite helpful to learn the subject. Try it and wish you good luck with math.