> I entered y1=(sin x)^2-2.sinx-2 because sin^2 (x) causes an error on my > calc (syntax). Anyway, once you graph it try EVAL, x=-.82. (From the > graph screen/menu, MORE, MORE, F1). My calc said that y=-.003134... Well "2.sinx" causes an error syntax in the parser in my head... What does that mean?