In the below code of a customtkinter GUI application of Regula Falsi Numerical Method, kindly update the part where it updates the equation so it accepts cos, sin equations as well for e.g. (2*math.cos + 1).

Kindly run the code and make it more efficient hence then it will take all kind of equations that involves cos, sin as well.

Code:

from tkinter import * import customtkinter import math customtkinter.set_appearance_mode("dark") customtkinter.set_default_color_theme("dark-blue") root = customtkinter.CTk() root.geometry("700x600") root.title("Implementation of Numerical Methods") def RegulaFalsi(): def f(x): return x*x - 1 def RF(x0,x1,e): Iteration = 1 condition = True while condition: x2 = x0 - (x1-x0) * f(x0)/( f(x1) - f(x0) ) RF_Iterations_Result.set('Iteration-%d, X2 = %0.6f and f(X2) = %0.6f' % (Iteration, x2, f(x2))) root.update_idletasks() if f(x0) * f(x2) < 0: x1 = x2 else: x0 = x2 Iteration = Iteration + 1 condition = abs(f(x2)) > e RegulaFalsi_Root_Result.set(' Required Root using Regula Falsi Method is: %0.8f' % x2) root.update_idletasks() eq = equation1.get() x0 = x0_entry1.get() x1 = x1_entry1.get() e = e_entry1.get() f = lambda x: eval(eq) x0 = float(x0) x1 = float(x1) e = float(e) if f(x0) * f(x1) > 0.0: print('Not in range') else: RF(x0,x1,e) tabView = customtkinter.CTkTabview(root) tabView.pack(padx = 20, pady = 60) tabView.add("Regular Falsi") frame = customtkinter.CTkFrame(master=root) frame.pack(pady=5, padx=5, fill="both", expand=True) RegulaFalsi_Root_Result = StringVar() RF_Iterations_Result = StringVar() equation1 = customtkinter.CTkEntry(tabView.tab("Regular Falsi"), placeholder_text="eq") equation1.pack(pady=12, padx=10) x0_entry1 = customtkinter.CTkEntry(tabView.tab("Regular Falsi"), placeholder_text="x0") x0_entry1.pack(pady=12, padx=10) x1_entry1 = customtkinter.CTkEntry(tabView.tab("Regular Falsi"), placeholder_text="x1") x1_entry1.pack(pady=12, padx=10) e_entry1 = customtkinter.CTkEntry(tabView.tab("Regular Falsi"), placeholder_text="e") e_entry1.pack(pady=12, padx=10) button2 = customtkinter.CTkButton(tabView.tab("Regular Falsi"), command=RegulaFalsi, text="Regular Falsi") button2.pack(pady=12, padx=10) label4 = customtkinter.CTkLabel(tabView.tab("Regular Falsi"), textvariable = RF_Iterations_Result) label4.pack(pady=20, padx=20, fill="both", expand=True) label3 = customtkinter.CTkLabel(tabView.tab("Regular Falsi"), textvariable = RegulaFalsi_Root_Result) label3.pack(pady=20, padx=20, fill="both", expand=True) root.mainloop()