body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} You must have JavaScript enabled to use this site.

mathleaks.com

mathleaks.com

Start chapters

Start

History

History

{{ item.displayTitle }}

No history yet!

Progress & Statistics

Progress

Student

Teacher

Expand menu

Minimize

{{ courseTrack.displayTitle }}

{{ statistics.percent }}%

Sign in to view progress

{{ printedBook.courseTrack.name }} {{ printedBook.name }}

Unit Circle

Concept

Unit Circle

The unit circle is a circle with radius $1$ and its center in the origin.

For every point on the unit circle, the coordinates are given by sine and cosine values of the angle the segment from the point to the origin creates with the positive $x$ -axis.

$x = cos (θ) and y = sin (θ)$