The cos() function in p5.js is used to calculate the cosine value of an angle (taken in radian) as input parameter of the function and returns the result between -1 to 1.
Syntax:
cos(angle)
Parameters: This function accepts a single parameter angle which is an angle in radian whose cosine value to be calculated.
Return Value: It returns the cosine value of an angle in radian taken as the input parameter.
Below program illustrates the cos() function in p5.js:
Example: This example uses cos() function to get cosine value of an angle in radian.
function setup() {        // Create Canvas of given size     createCanvas(550, 130); }    function draw() {            // Set the background color     background(220);            // Initialize the parameter with     // angles in radian only     let a = 0;     let b = 8.9;     let c = 47;     let d = 5;            // Call to cos() function     let v = cos(a);     let w = cos(b);     let x = cos(c);     let y = cos(d);            // Set the size of text     textSize(16);            // Set the text color     fill(color('red'));          // Getting cosine value     text("Cosine value of angle 0 (in radian) is : " + v, 50, 30);     text("Cosine value of angle 8.9 (in radian) is : " + w, 50, 50);     text("Cosine value of angle 47 (in radian) is : " + x, 50, 70);     text("Cosine value of angle 5 (in radian) is : " + y, 50, 90);     } |
Output:
Note: In the above code, the input angle should be in radian. For converting degree angle into radian we can use the following formula:
Angles_in_radian = (Ï€/180)*angles_in_degree
Reference: https://p5js.org/reference/#/p5/cos
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