Unit circle trigonometry

See description below. In mathematics, a unit circle is a circle with a radius of one. In trigonometry, the unit circle is the circle of radius one centered at the origin (0, 0) in the Cartesian coordinate system in the Euclidean plane. The point of the unit circle is that it makes other parts of the mathematics easier and neater. For instance, in the unit circle, for any angle θ, the trig values for sine and cosine are clearly nothing more than sin(θ) = y and cos(θ) = x. ... Certain angles…

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with the x- and y-axes indicated. The circle is marked and labeled in both radians and degrees at all quadrantal angles and angles that have reference angles of 30°, 45°, and 60°. At each angle, the coordinates are given. These coordinates can be used to find the six trigonometric values/ratios. The x-coordinate is the value of cosine at the given angle and the y-coordinate is the value of sine…

This brief crash course unit is designed to expose you to radians and the unit circle. To do this, you will review special right triangles (45-45-90, 30-60-90), the three basic trigonometric...

Pictures of unit circle printables. free images that you can download and use!

This online textbook provides an overview of Calculus in clear, easy to understand language designed for the non-mathematician. [Online Publication](http://www-math.mit.edu/~djk/calculus_beginners/)

A blog about teaching high school math | Pre-Algebra, Algebra 1, Geometry and Algebra 2

A radian is a unit of angle that is equal to an angle at the center of the circle in which the arch is equal to the radius. I would tell someone that a radian is an angle measure around a unit...