I tried to use the limit function but my calculator said that it requires CAS, which I don't think mine has. Is there another way to find the limit?
In the graph-window I can type in "f(x)=4x+6 | 0<x<10" so I restrict the graph. I tried using the same method to restrict the outcome of an equation in the Notes-window, but it didn't work. Is there a way to restrict the outcome of equations?
It would help me solve an equation like this much more simple: Equation
You should be able to do this with solve(2cos(x)² + cos(x) - 1 = 0 , x)|0<x<π/2 and make sure your general angle unit is set to Radians.
I usually just enter it as a multi-part equation with only one part. In the template screen, choose the one with commas and three rows, then enter 1 when it asks how many parts you want.