Python: Draw Tangent Graph Using Math & Turtle Libraries

I was stuck on this task for several days. Although, the solution should be simple. I apply math and turtle libraries for drawing 3 graphs: sine, cosine and tangent with amplitude

Solution 1:

To show that it should work, below is my minimalist implementation of plotting sine, cosine and tangent using turtle graphics:

import math
from turtle import Turtle, Screen

RESOLUTION = 0.1

def plot(x_points, y_points):
    for i, y in enumerate(y_points):
        ifabs(y) <= 2.0:
            yertle.goto(x_points[i], y)
            yertle.pendown()
        else:
            yertle.penup()

    yertle.penup()

screen = Screen()
screen.setworldcoordinates(0, -1.5, 2 * math.pi / RESOLUTION, 1.5)

yertle = Turtle()
yertle.penup()

x = range(int(2 * math.pi / RESOLUTION))

yertle.color("blue")
plot(x, (math.cos(n * RESOLUTION) for n in x))

yertle.color("red")
plot(x, (math.sin(n * RESOLUTION) for n in x))

yertle.color("dark green")
plot(x, (math.tan(n * RESOLUTION) for n in x))

screen.exitonclick()

OUTPUT

My guess is you're not waiting long enough for tangent to plot, i.e. it's slowly plotting lots of points off the window and will eventually reappear on-screen. My code works around that issue.

Solution 2:

try about this. Near to work for me, no time to get better:

for angle in range(360): y=0

y = math.tan(math.radians(angle))
if y<1and y>-1:
    t.goto(angle, y * 200)

Solution 3:

With asipmtotas

for angle in range(360):
    t.penup()
    y = math.tan(math.radians(angle))

    if y<1 and y>-1:
        t.pendown()
        t.goto(angle, y * 200)
    else:
        t.penup()
        #t.pendown()
        t.goto(angle, 200)