lilia123003: how do i get x by itself when it is with sine
I think you mean something like sin (x) = 1/2,
then x = sin
-1 1/2
This button is somewhere on your calculator, make sure you know whether you want degrees or radials.
If you don't know what i mean by that look at this;
http://www.mathwarehouse.com/trigonometry/radians/convert-degee-to-radians.php
This might also be useful to calculate some of the answers by heart
http://www.mathsisfun.com/geometry/unit-circle.html
+2353 
