From basic math to pre-calculus, Microsoft Mathematics includes features that makes it easy to create graphs in 2D and 3D, calculate numerical results, solve equations or inequalities, and ...

cos(θ) is the x-coordinate of the point P and, sin(θ) is the y-coordinate of the point P. This applet shows how the graphs of sin(θ) and cos(θ) follow directly from the definition of these functions.