In this article I am going explain how to create Shapes using Trigonometry with jQuery. JavaScript supports 3 trigonometric functions. This idea might help you if you want place elements on particular shape.

**Math.sin(angle)**

**Math.cos(angle)**

We need CSS and jQuery function to create pixels.

#### CSS :

#circle b { position:absolute; color:rgb(91,111,135); } #circle { position:relative; margin:auto; width:400px; height:400px; vertical-align:center; }

#### putpixel function :

function putpixel(mx,my) { $("#circle").append("<b style='left:"+mx+"px;top:"+my+"px'>.</b>"); }

### Circle :

**X =**X -coordinate

**Y =**Y -coordinate

**R =**Radius of the Circle

**X = R cosθ**

**Y = R sinθ**

#### jQuery :

**xc, yc :**Center of the Cicle

**i :**Angle

**r :**Radius

var xc=200,yc=200; var i=360,r=200; while(i>0) { putpixel(xc + r*Math.cos(i),yc+ r*Math.sin(i)); i = i - 0.1; }

### Ellipse :

**X =**X -coordinate

**Y =**Y -coordinate

**Ra,**

**Rb**

**= One-half of the Ellipse's major and minor axes**

**X = Ra cosθ**

**Y = Rb sinθ**

#### jQuery :

**xc, yc :**Center of the Cicle

**i :**Angle

**ra, rb :**One-half of the Ellipse's major and minor axes

var xc=200,yc=200; var i=360,ra=200, rb=100; while(i>0) { putpixel(xc + ra*Math.cos(i),yc+ rb*Math.sin(i)); i = i - 0.1; }

### Random shape :

**X =**X -coordinate

**Y =**Y -coordinate

**a, b**= Random variables

**X = a ( 1 / cosθ )**

**Y = b**

**( 1 / sinθ )**

#### jQuery :

**xc, yc :**Center

**i :**Angle

**a**= Random variables

var xc=200,yc=200; var i=360,a=200, b=100; while(i>0) { putpixel(xc + a*(1/Math.cos(i)),yc+ b*(1/Math.sin(i))); i = i - 0.1; }

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