can't graph trigonometric function of secx, cscx, cotx, tanx,...

[barakasamsara]

source code:

class PlotFunctions(GraphScene):
CONFIG = {
"x_min" : -10,
"x_max" : 10.3,
"y_min" : -1.5,
"y_max" : 1.5,
"graph_origin" : ORIGIN ,
"function_color" : RED ,
"axes_color" : GREEN,
"x_labeled_nums" :range(-10,12,2),

}
def construct(self):
    self.setup_axes(animate=True)
    func_graph=self.get_graph(self.func_to_graph,self.function_color)
    func_graph2=self.get_graph(self.func_to_graph2)
    vert_line = self.get_vertical_line_to_graph(TAU,func_graph,color=YELLOW)
    graph_lab = self.get_graph_label(func_graph, label = "\\cos(x)")
    graph_lab2=self.get_graph_label(func_graph2,label = "\\sin(x)", x_val=-10, direction=UP/2)
    two_pi = TexMobject("x = 2 \\pi")
    label_coord = self.input_to_graph_point(TAU,func_graph)
    two_pi.next_to(label_coord,RIGHT+UP)



    self.play(ShowCreation(func_graph),ShowCreation(func_graph2))
    self.play(ShowCreation(vert_line), ShowCreation(graph_lab), ShowCreation(graph_lab2),ShowCreation(two_pi))


def func_to_graph(self,x):
    #return np.cos(x)
    return np.tan(x)

def func_to_graph2(self,x):
    return np.sin(x)

I replaced "return np.cos(x)" to "return np.tan(x)"...i got this:

and then I replaced "return np.cos(x)" to "return np.sec(x)/cot(x)/csc(x)"...i got this:
AttributeError: module 'numpy' has no attribute 'sec'...

[zavden]

Those functions are discontinuous, you must break them into pieces to make them work, like this. Also you can import the math package of python instead numpy.

[barakasamsara]

Those functions are discontinuous, you must break them into pieces to make them work, like this. Also you can import the math package of python instead numpy.

Thanks very much, but it didn't work...
i got this:

source code:

and how to import the math package of python instead numpy....
does it means i need uninstall numpy package and install the math package of python ...
or i just need to use the code:from math import ***??....

and

[zavden]

This is not a programming problem, the problem is that you do not know about trig functions. The tangent function is discontinuous in PI/2 + n*PI, so you should break it to pieces at those intervals.

No, you don't need to uninstall numpy, you just have to import math as a module.

If you want to use manim you need to have basic programming knowledge in python, so read the documentation if you don't know what you are doing.

This is one way to do it:

class TanGraph(GraphScene):
    CONFIG = {
        "y_max" : 10,
        "y_min" : -10,
        "x_max" : 5,
        "x_min" : -5,
        "graph_origin" : ORIGIN,
    }
    def construct(self):
        self.setup_axes()
        tan_function = lambda x: np.tan(x)
        tan_graph = VGroup()
        approx_factor = 0.934
        for n in range(-1,2):
            graph = self.get_graph(tan_function, 
                                    color = RED,
                                    x_min = (-PI/2)*approx_factor+n*PI,
                                    x_max = (PI/2)*approx_factor+n*PI
                                    )
            tan_graph.add(graph)
        
        self.play(
            ShowCreation(tan_graph),
        )
        self.wait()

Result:

[barakasamsara]

This is not a programming problem, the problem is that you do not know about trig functions. The tangent function is discontinuous in PI/2 + n*PI, so you should break it to pieces at those intervals.

No, you don't need to uninstall numpy, you just have to import math as a module.

If you want to use manim you need to have basic programming knowledge in python, so read the documentation if you don't know what you are doing.

This is one way to do it:

class TanGraph(GraphScene):
    CONFIG = {
        "y_max" : 10,
        "y_min" : -10,
        "x_max" : 5,
        "x_min" : -5,
        "graph_origin" : ORIGIN,
    }
    def construct(self):
        self.setup_axes()
        tan_function = lambda x: np.tan(x)
        tan_graph = VGroup()
        approx_factor = 0.934
        for n in range(-1,2):
            graph = self.get_graph(tan_function, 
                                    color = RED,
                                    x_min = (-PI/2)*approx_factor+n*PI,
                                    x_max = (PI/2)*approx_factor+n*PI
                                    )
            tan_graph.add(graph)
        
        self.play(
            ShowCreation(tan_graph),
        )
        self.wait()

Result:

Thanks a loooooooot!!! now i can graph function of tanx , but i still can't graph the function of cotx...

neither the secx nor cscx.....

[Elteoremadebeethoven]

cot(x) = 1/tan(x)

[barakasamsara]

cot(x) = 1/tan(x)

thanks a looooooot.... i think i just made a really stupid question....😂

[barakasamsara]

cot(x) = 1/tan(x)

btw, if i want to replace the axis number label from "1,2,3,···"to "pi/2, pi,...." what should i do...
such as ,
from:

to:

[Elteoremadebeethoven]

See my 2D graph tutorial in GitHub

[barakasamsara]

See my 2D graph tutorial in GitHub

thanks ....