Connecting the Unit Circle to Trigonometric Functions

Miacademy & MiaPrep Learning Channel

This educational video provides a clear and methodical explanation of how the unit circle defines the primary trigonometric functions: sine, cosine, and tangent. Moving beyond basic right-triangle trigonometry, the lesson connects the geometry of a circle with a radius of one to the algebraic coordinates of points along its circumference. The narrator demonstrates that for any angle ͸ in standard position, the cosine of the angle corresponds to the x-coordinate and the sine corresponds to the y-coordinate of the intersecting point on the unit circle.