from math import *
from tkinter import *

def II(x):
    return I1 + int((x - X1)*(I2 - I1)/(X2 - X1))

def JJ(y):
    return J2 + int((y - Y1)*(J1 - J2)/(Y2 - Y1))

def F(x):
    if x == 0: f = 1
    else: f = exp(-x/50)
    return f * cos(x)

X1 = -20; X2 = 30; 
print(X2)
Y1 = -1.2; Y2 = 2.2
I1 = 0; J1 = 0
I2 = 500; J2 = 500
n = 25
h = (X2 - X1)/n

root = Tk()
root.title('График функции F(x) = sin(x)/x, -5*pi<=x<=5*pi')

canv = Canvas(root, width = I2 + 50, height = J2 + 50, bg = 'red')
canv.create_line(II(0), JJ(Y1), II(0), JJ(Y2), width = 2)
canv.create_line(II(X1), JJ(0), II(X2), JJ(0), width = 2)

k = 0
while k<Y2:
    canv.create_line(II(-0.2), JJ(k), II(0.2), JJ(k), width = 2)
    canv.create_text(I2+30, JJ(k), text = str(int(100*k)/100))
    k += (Y2-Y1)/10

k = 0

while k>Y1:
    canv.create_line(II(-0.2), JJ(k), II(0.2), JJ(k), width = 2)
    canv.create_text(J2+30, JJ(k), text = str(int(100*k)/100))
    k -= (Y2-Y1)/10   
k = 0

while k<X2:
    canv.create_line(II(k), JJ(-0.02), II(k), JJ(0.02), width = 2)
    
    canv.create_text(II(k), J2+30, text = str(int(100*k)/100))
    k += (X2-X1)/10
k = 0
while k>X1:
    canv.create_line(II(k), JJ(-0.02), II(k), JJ(0.02), width = 2)
    
    canv.create_text(II(k), I2+30, text = str(int(100*k)/100))
    k -= (X2-X1)/10

    

points = []
x = X1+(pi/2)
for i in range(n):
    y = F(x)
    P = (II(x), JJ(y))
    points.append(P)
    x = x + h
    
canv.create_line(points, width = 1, fill = 'yellow', smooth = 1)

canv.create_text(40, 480, text = 'Xmin = ' + str(int(100*X1)/100))
canv.create_text(460, 480, text = 'Xmax = ' + str(int(100*X2)/100))
canv.create_text(210, 480, text = 'Ymin = ' + str(int(100*Y1)/100))
canv.create_text(210, 20, text = 'Ymax = ' + str(int(100*Y2)/100))

canv.pack()
root.mainloop()