Casio FX-115ES Scientific Calculator "differential equations" Questions

...on Casio fx-991es You can calculate first derivatives of some functions at given points; you can calculate definite integrals over a given interval, but you cannot solve differential

...differential system of equations y1'(x)=y2(x), y2'(x)=-y1(x) for initial conditions y1(0)=0, y2(0)=-1.Finally, x axes=y1(x) and y axes=y2(x) I checked the manual and could not find an error ...

runge kutta method on casio fx 991 ms It can calculate numerical values of derivatives of functions and definite integrals but it does not solve differential equations.

v=2sin(2pi500t-45^0) What do you want to do with this equation? Plot it? Differentiate it? Integrate it? Find its roots (there are an infinite number of them)?

...differential calculation results (derivatives:decrease the delta, the step) 6. Poor precision in integral calculation results ( integrals: Change the tolerance tol) 7.Cannot find results in equation ...

when i try to differentiate an equation, the message: "error: non-algebraic variable in expression" what does this mean, and how do i fix it? it sounds like your hitting the secondary key ...

...What is the meaning of the error message "invalid axes" This is problem with graphing differential equation. Invalid Axes error occurs if Axes=TIME or if t(time) is set as a CUSTOM

When i attempt to differentiate an equation, the answer is a matrix, how can i get it back to normal, and get the actual answer? I do cannot see how you can go from a scalar to a matrix. The only ...

...worry!!!!! Hello, The numerical solutions to certain differential equations can be sought graphically. Representing the flow lines in a plane can help visualize the family of solutions. Hope it

I can't do simple commands like expand( ), integrade, differentiate,... I know that the command is expand(X^3-1) but the answer i get is always { } with no answer in it thanks for ur help Tom Hi ...