Miscellaneous Maths

Unit circle animation

unitcircle

The angle θ is shown in grey.

The circle above has radius=1, so the horizontal and vertical coordinates of the black point correspond to cos(θ) and sin(θ).

cos(θ) is measured (in blue) along the horizontal axis and varies from -1 to 1.

sin(θ) is measured (in red) along the vertical axis and varies from -1 to 1.