If you are someone who likes mathematics it will be useful for you to know that Excel has a lot of trigonometric functions, and we can use them whenever is necessary to plot your sinusoids. These are the functions of SIN (sine), COS (cosine), TAN (tangent), COT (cotangent), and there are many others as well. If you are curious you can easily find them in the Excel function library. How to draw a sinusoid?