How to draw graphs for trigonometric function ?
Please do explain in brief.

Dear Student

Graphing a trigonometric function is actually pretty easy if you know what numbers to look at.
Recall that a trigonometric function (trig function) is simply a mathematical function of an angle.

There are three basic trig functions :

1. sine function
2. cosine function
3. tangent function

There are also three inverse functions :

1. cosecant function - reciprocal of the sine function
2. secant function - reciprocal of the cosine function
3. cotangent function - reciprocal of the tangent function.

To graph these functions, it's helpful to know what their basic graphs look like without any additional numbers changing the graph :
                                                    
                                                                        Graph of sin x
                        
                               

                                                                        Graph of cos x
           
                           

                                                                                 Graph of tan x

                                         

Now, you can use the properties of trigonometric functions to help you graph any one. This is because all trigonometric functions follow the same rules.

Take the standard trigonometric function :

                                                                   f (x) = A trig (Bx - C) +D

where

            trig stands for basic trigonometric function (cosine, sine, or tangent)
            
           A is amplitude

          Phase shift is given by C / B

          Vertical shift is given by D

Regards